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Today — April 12th 2025فیزیک و مهندسی
  • ✇Astronomy Magazine
  • NASA faced with massive budget cuts in White House proposalSamantha Hill
    NASA could see a 20 percent cut to its overall 2026 budget, with funding for its science division slashed in half, if a preliminary budget proposal from the White House is enacted. The cuts would, among other impacts, cancel several missions and shut down NASA’s Goddard Space Flight Center. The proposed cuts were laid outContinue reading "NASA faced with massive budget cuts in White House proposal" The post NASA faced with massive budget cuts in White House proposal appeared first on Astronomy M
     

NASA faced with massive budget cuts in White House proposal

April 12th 2025 at 1:45 am

NASA could see a 20 percent cut to its overall 2026 budget, with funding for its science division slashed in half, if a preliminary budget proposal from the White House is enacted. The cuts would, among other impacts, cancel several missions and shut down NASA’s Goddard Space Flight Center. The proposed cuts were laid outContinue reading "NASA faced with massive budget cuts in White House proposal"

The post NASA faced with massive budget cuts in White House proposal appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • C/2025 F2 (SWAN): A new comet is in the spring skyMichael E. Bakich
    In late March, three amateur astronomers discovered Comet C/2025 F2 (SWAN). Immediately, predictions began appearing online stating the brightness this object might reach. But, as comet discoverer David Levy says, “Comets are like cats. They have tails and do what they want.”  In other words, don’t bet the house that current predictions will come true.Continue reading "C/2025 F2 (SWAN): A new comet is in the spring sky" The post C/2025 F2 (SWAN): A new comet is in the spring sky appeared first o
     

C/2025 F2 (SWAN): A new comet is in the spring sky

April 12th 2025 at 12:27 am

In late March, three amateur astronomers discovered Comet C/2025 F2 (SWAN). Immediately, predictions began appearing online stating the brightness this object might reach. But, as comet discoverer David Levy says, “Comets are like cats. They have tails and do what they want.”  In other words, don’t bet the house that current predictions will come true.Continue reading "C/2025 F2 (SWAN): A new comet is in the spring sky"

The post C/2025 F2 (SWAN): A new comet is in the spring sky appeared first on Astronomy Magazine.

Yesterday — April 11th 2025فیزیک و مهندسی
  • ✇Astronomy Magazine
  • The Sky This Week from April 11 to 18: The April Full Pink Moon shinesAlison Klesman
    Sky This Week is brought to you in part by Celestron. Friday, April 11An hour after sunset, the bright planet Jupiter stands out in eastern Taurus, forming a V with the two tips of the Bull’s horns, Zeta (ζ) Tauri and Gamma (γ) Aurigae. Below Jupiter shines Aldebaran, the Bull’s alpha star, a magnitude 0.9Continue reading "The Sky This Week from April 11 to 18: The April Full Pink Moon shines" The post The Sky This Week from April 11 to 18: The April Full Pink Moon shines appeared first on Astro
     

The Sky This Week from April 11 to 18: The April Full Pink Moon shines

April 11th 2025 at 8:30 am

Sky This Week is brought to you in part by Celestron. Friday, April 11An hour after sunset, the bright planet Jupiter stands out in eastern Taurus, forming a V with the two tips of the Bull’s horns, Zeta (ζ) Tauri and Gamma (γ) Aurigae. Below Jupiter shines Aldebaran, the Bull’s alpha star, a magnitude 0.9Continue reading "The Sky This Week from April 11 to 18: The April Full Pink Moon shines"

The post The Sky This Week from April 11 to 18: The April Full Pink Moon shines appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • Amateur astronomy industry grapples with tariff chaosMark Zastrow
    The telescope industry in the U.S. has been thrown into chaos as a result of the Trump administration’s escalating trade conflict with China, as manufacturers contemplate price hikes and worry about the possibility of slowing demand. In the latest round of tariffs, U.S. President Donald Trump announced April 9 that duties on goods imported fromContinue reading "Amateur astronomy industry grapples with tariff chaos" The post Amateur astronomy industry grapples with tariff chaos appeared first on
     

Amateur astronomy industry grapples with tariff chaos

April 11th 2025 at 7:45 am

The telescope industry in the U.S. has been thrown into chaos as a result of the Trump administration’s escalating trade conflict with China, as manufacturers contemplate price hikes and worry about the possibility of slowing demand. In the latest round of tariffs, U.S. President Donald Trump announced April 9 that duties on goods imported fromContinue reading "Amateur astronomy industry grapples with tariff chaos"

The post Amateur astronomy industry grapples with tariff chaos appeared first on Astronomy Magazine.

Blue Origin’s all-female spaceflight urges women to shoot for the stars — but astronaut memoirs reveal the cost of being exceptional

April 11th 2025 at 3:30 am
For the first time since Russian cosmonaut Valentina Tereshkova’s solo flight in 1963, a spacecraft will fly with only women aboard. Blue Origin’s all-female crew includes pop star Katy Perry.

© Craig T Fruchtman/Getty Images

  • ✇Astronomy Magazine
  • Come with Astronomy associate editor Michael Bakich to EgyptMichael E. Bakich
    I’m leading another eclipse trip. No surprise there. I’ve traveled to observe 16 total solar eclipses, and on all but two of them I was the official astronomer. But this one’s special, even for me.  First, it boasts the longest totality — 6 minutes 23 seconds — that anyone alive will be able to witness.Continue reading "Come with Astronomy associate editor Michael Bakich to Egypt" The post Come with Astronomy associate editor Michael Bakich to Egypt appeared first on Astronomy Magazine.
     

Come with Astronomy associate editor Michael Bakich to Egypt

April 11th 2025 at 12:06 am

I’m leading another eclipse trip. No surprise there. I’ve traveled to observe 16 total solar eclipses, and on all but two of them I was the official astronomer. But this one’s special, even for me.  First, it boasts the longest totality — 6 minutes 23 seconds — that anyone alive will be able to witness.Continue reading "Come with Astronomy associate editor Michael Bakich to Egypt"

The post Come with Astronomy associate editor Michael Bakich to Egypt appeared first on Astronomy Magazine.

Before yesterdayفیزیک و مهندسی
  • ✇Astronomy Magazine
  • A fledgling SWANMark Zastrow
    Chris Schur from Payson, Arizona Comet C/2025 F2 (SWAN), discovered March. 29 by amateur astronomers in public imagery taken by the Solar Wind Anisotropies (SWAN) camera on ESA’s Solar and Heliospheric Observer (SOHO) spacecraft, has reached magnitude 7.5. This imager caught the comet on April 8 in the morning sky with an 8-inch RASA scopeContinue reading "A fledgling SWAN" The post A fledgling SWAN appeared first on Astronomy Magazine.
     

A fledgling SWAN

April 10th 2025 at 11:43 pm

Chris Schur from Payson, Arizona Comet C/2025 F2 (SWAN), discovered March. 29 by amateur astronomers in public imagery taken by the Solar Wind Anisotropies (SWAN) camera on ESA’s Solar and Heliospheric Observer (SOHO) spacecraft, has reached magnitude 7.5. This imager caught the comet on April 8 in the morning sky with an 8-inch RASA scopeContinue reading "A fledgling SWAN"

The post A fledgling SWAN appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • How you can observe impacts on JupiterStephen James O'Meara
    Lucky is the word I’d use for any telescopic observers who got to see one of the most stunning spectacles in nature when Comet Shoemaker-Levy 9 impacted Jupiter in July 1994. The collision left inky scars in the planet’s atmosphere that persisted for months, with the largest welts visible in even the smallest of telescopes.Continue reading "How you can observe impacts on Jupiter" The post How you can observe impacts on Jupiter appeared first on Astronomy Magazine.
     

How you can observe impacts on Jupiter

April 10th 2025 at 4:30 pm

Lucky is the word I’d use for any telescopic observers who got to see one of the most stunning spectacles in nature when Comet Shoemaker-Levy 9 impacted Jupiter in July 1994. The collision left inky scars in the planet’s atmosphere that persisted for months, with the largest welts visible in even the smallest of telescopes.Continue reading "How you can observe impacts on Jupiter"

The post How you can observe impacts on Jupiter appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • Three new planets found around Barnard’s StarAlison Klesman
    As of 2025, astronomers have identified at least 14 stars within 10 light-years of the Sun. After the Alpha Centauri system, the next closest is Barnard’s Star, a solo red dwarf roughly 6 light-years away. And thanks to new observations, we now know that Barnard’s Star is orbited by four small, rocky exoplanets. But it’sContinue reading "Three new planets found around Barnard’s Star" The post Three new planets found around Barnard’s Star appeared first on Astronomy Magazine.
     

Three new planets found around Barnard’s Star

April 9th 2025 at 9:30 pm

As of 2025, astronomers have identified at least 14 stars within 10 light-years of the Sun. After the Alpha Centauri system, the next closest is Barnard’s Star, a solo red dwarf roughly 6 light-years away. And thanks to new observations, we now know that Barnard’s Star is orbited by four small, rocky exoplanets. But it’sContinue reading "Three new planets found around Barnard’s Star"

The post Three new planets found around Barnard’s Star appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • This Week in Astronomy with Dave Eicher: The April Lyrid Meteor ShowerDavid J. Eicher
    In this episode, Astronomy magazine Editor Dave Eicher invites you to head out and view the first major meteor shower of the spring, the Lyrids. Because more than one meteor shower originates from the constellation Lyra, these are the April Lyrids. This shower is visible from April 15 to April 29, with the peak coming on AprilContinue reading "This Week in Astronomy with Dave Eicher: The April Lyrid Meteor Shower" The post This Week in Astronomy with Dave Eicher: The April Lyrid Meteor Shower ap
     

This Week in Astronomy with Dave Eicher: The April Lyrid Meteor Shower

April 9th 2025 at 6:40 pm

In this episode, Astronomy magazine Editor Dave Eicher invites you to head out and view the first major meteor shower of the spring, the Lyrids. Because more than one meteor shower originates from the constellation Lyra, these are the April Lyrids. This shower is visible from April 15 to April 29, with the peak coming on AprilContinue reading "This Week in Astronomy with Dave Eicher: The April Lyrid Meteor Shower"

The post This Week in Astronomy with Dave Eicher: The April Lyrid Meteor Shower appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • Mystery ‘interstellar icy objects’ are carrying the seeds of lifeAlison Klesman
    In the century or so since Edwin Hubble discovered that the Milky Way is just one of countless galaxies in the universe, our understanding of our home galaxy has grown in leaps and bounds. But as recent research into a new type of cosmic object shows, there’s still plenty left to learn. Astronomers found twoContinue reading "Mystery ‘interstellar icy objects’ are carrying the seeds of life" The post Mystery ‘interstellar icy objects’ are carrying the seeds of life appeared first on Astronomy Mag
     

Mystery ‘interstellar icy objects’ are carrying the seeds of life

April 9th 2025 at 4:30 pm

In the century or so since Edwin Hubble discovered that the Milky Way is just one of countless galaxies in the universe, our understanding of our home galaxy has grown in leaps and bounds. But as recent research into a new type of cosmic object shows, there’s still plenty left to learn. Astronomers found twoContinue reading "Mystery ‘interstellar icy objects’ are carrying the seeds of life"

The post Mystery ‘interstellar icy objects’ are carrying the seeds of life appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • The summer Milky Way returnsMark Zastrow
    Gianni Tumino from Ragusa, Italy Evening views of the Milky Way’s central regions return to the Northern Hemisphere, as seen in this shot taken from Punta Castellazzo on the island of Sicily, Italy. To image the sky, the imager used a Canon EOS Ra and 28mm lens at f/3.2 with a dual-band filter to captureContinue reading "The summer Milky Way returns" The post The summer Milky Way returns appeared first on Astronomy Magazine.
     

The summer Milky Way returns

April 9th 2025 at 1:34 am

Gianni Tumino from Ragusa, Italy Evening views of the Milky Way’s central regions return to the Northern Hemisphere, as seen in this shot taken from Punta Castellazzo on the island of Sicily, Italy. To image the sky, the imager used a Canon EOS Ra and 28mm lens at f/3.2 with a dual-band filter to captureContinue reading "The summer Milky Way returns"

The post The summer Milky Way returns appeared first on Astronomy Magazine.

Record-breaking 'dead' galaxy discovered by JWST lived fast and died young in the early universe

April 8th 2025 at 8:30 pm
The most distant and earliest "dead" massive galaxy ever seen shows some galaxies lived fast and died young shortly after the Big Bang.

© NASA/CSA/ESA, A. Weibel, P. A. Oesch (University of Geneva), RUBIES team: A. de Graaff (MPIA Heidelberg), G. Brammer (Niels Bohr Institute), DAWN JWST Archive

  • ✇Astronomy Magazine
  • SpaceX, Blue Origin, ULA win Space Force contracts worth up to $13.7BAlison Klesman
    Launch providers SpaceX, Blue Origin, and United Launch Alliance — a joint venture between Boeing and Lockheed Martin Space — on Friday snapped up billions of dollars in national security launch contracts. Space Systems Command, the branch of Space Force responsible for development, acquisition, launch, and logistics, estimated the value of the National Security Space Launch (NSSL)Continue reading "SpaceX, Blue Origin, ULA win Space Force contracts worth up to $13.7B" The post SpaceX, Blue Origi
     

SpaceX, Blue Origin, ULA win Space Force contracts worth up to $13.7B

April 8th 2025 at 6:30 pm

Launch providers SpaceX, Blue Origin, and United Launch Alliance — a joint venture between Boeing and Lockheed Martin Space — on Friday snapped up billions of dollars in national security launch contracts. Space Systems Command, the branch of Space Force responsible for development, acquisition, launch, and logistics, estimated the value of the National Security Space Launch (NSSL)Continue reading "SpaceX, Blue Origin, ULA win Space Force contracts worth up to $13.7B"

The post SpaceX, Blue Origin, ULA win Space Force contracts worth up to $13.7B appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • ESO report shows energy plant would cause ‘devastating and irreversible’ impactChristopher Cokinos
    A new study by the European Southern Observatory (ESO) contradicts corporate claims that a proposed hydrogen fuel facility would not harm observatories in Chile. Earlier this year, ESO alerted the astronomy community that its facilities at Paranal — with some of the world’s darkest skies — were threatened by the plans to build a 7,400-acreContinue reading "ESO report shows energy plant would cause ‘devastating and irreversible’ impact" The post ESO report shows energy plant would cause ‘devastat
     

ESO report shows energy plant would cause ‘devastating and irreversible’ impact

April 8th 2025 at 4:30 pm

A new study by the European Southern Observatory (ESO) contradicts corporate claims that a proposed hydrogen fuel facility would not harm observatories in Chile. Earlier this year, ESO alerted the astronomy community that its facilities at Paranal — with some of the world’s darkest skies — were threatened by the plans to build a 7,400-acreContinue reading "ESO report shows energy plant would cause ‘devastating and irreversible’ impact"

The post ESO report shows energy plant would cause ‘devastating and irreversible’ impact appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • The best new astronomy products we saw at NEAF 2025Phil Harrington
    The annual Northeast Astronomy Forum (NEAF) was held over the weekend of April 5 and 6 at Rockland Community College in Suffern, New York. Organized by the Rockland Astronomy Club, NEAF is one of the world’s premier annual astronomy expos. It brings together amateur astronomers, professionals, and industry leaders for a weekend of discovery andContinue reading "The best new astronomy products we saw at NEAF 2025" The post The best new astronomy products we saw at NEAF 2025 appeared first on Astr
     

The best new astronomy products we saw at NEAF 2025

April 8th 2025 at 12:20 am

The annual Northeast Astronomy Forum (NEAF) was held over the weekend of April 5 and 6 at Rockland Community College in Suffern, New York. Organized by the Rockland Astronomy Club, NEAF is one of the world’s premier annual astronomy expos. It brings together amateur astronomers, professionals, and industry leaders for a weekend of discovery andContinue reading "The best new astronomy products we saw at NEAF 2025"

The post The best new astronomy products we saw at NEAF 2025 appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • Was there ever a planet between Mars and Jupiter? Astronomy Staff
    Is there evidence of a planet ever existing between Mars and Jupiter? MarkSmithtown, New York This splendid question gives us an opportunity to distinguish between what we know and what we believe might be true. First, we know that myriad small bodies orbit the Sun between Mars and Jupiter. These objects are the asteroids that comprise the mainContinue reading "Was there ever a planet between Mars and Jupiter? " The post Was there ever a planet between Mars and Jupiter?  appeared first on Astron
     

Was there ever a planet between Mars and Jupiter? 

April 7th 2025 at 9:30 pm

Is there evidence of a planet ever existing between Mars and Jupiter? MarkSmithtown, New York This splendid question gives us an opportunity to distinguish between what we know and what we believe might be true. First, we know that myriad small bodies orbit the Sun between Mars and Jupiter. These objects are the asteroids that comprise the mainContinue reading "Was there ever a planet between Mars and Jupiter? "

The post Was there ever a planet between Mars and Jupiter?  appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • Review: Astronomy tests Vaonis’ Hestia telescope for your smartphoneRaymond Shubinski
    The new Hestia telescope by Vaonis is the third of the company’s innovative instruments I have reviewed, and once again, I’m impressed. Vaonis named their creation for the Greek goddess of the hearth and home, and released it after a successful 2023 Kickstarter campaign which raised $4.1 million in just a month. The Hestia isContinue reading "Review: Astronomy tests Vaonis’ Hestia telescope for your smartphone" The post Review: Astronomy tests Vaonis’ Hestia telescope for your smartphone appeare
     

Review: Astronomy tests Vaonis’ Hestia telescope for your smartphone

April 7th 2025 at 4:30 pm

The new Hestia telescope by Vaonis is the third of the company’s innovative instruments I have reviewed, and once again, I’m impressed. Vaonis named their creation for the Greek goddess of the hearth and home, and released it after a successful 2023 Kickstarter campaign which raised $4.1 million in just a month. The Hestia isContinue reading "Review: Astronomy tests Vaonis’ Hestia telescope for your smartphone"

The post Review: Astronomy tests Vaonis’ Hestia telescope for your smartphone appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • How Project Gemini changed spaceflightBen Evans
    Sixty years ago, a fleet of sleek little spaceships paved the way for America to land a man on the Moon. Project Gemini was a series of two-man, Earth-orbital missions that pioneered rendezvous, docking, and maneuvering in-space, as well as spacewalking — all of which had to be perfected before there was any chance ofContinue reading "How Project Gemini changed spaceflight" The post How Project Gemini changed spaceflight appeared first on Astronomy Magazine.
     

How Project Gemini changed spaceflight

By: Ben Evans
April 5th 2025 at 4:30 pm

Sixty years ago, a fleet of sleek little spaceships paved the way for America to land a man on the Moon. Project Gemini was a series of two-man, Earth-orbital missions that pioneered rendezvous, docking, and maneuvering in-space, as well as spacewalking — all of which had to be perfected before there was any chance ofContinue reading "How Project Gemini changed spaceflight"

The post How Project Gemini changed spaceflight appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • Horns of the SunMark Zastrow
    Fabrizio Melandri from Voltana, Italy The partial solar eclipse of March 29, 2025, gave viewers along the U.S. Eastern Seaboard a view of “devil’s horns” — the horns of a partially eclipsed Sun emerging from the horizon at sunrise. This photographer captured this phenomenon from Monticello, Maine, with a 4-inch f/7 refractor and Nikon DSLR. The post Horns of the Sun appeared first on Astronomy Magazine.
     

Horns of the Sun

April 4th 2025 at 9:30 am

Fabrizio Melandri from Voltana, Italy The partial solar eclipse of March 29, 2025, gave viewers along the U.S. Eastern Seaboard a view of “devil’s horns” — the horns of a partially eclipsed Sun emerging from the horizon at sunrise. This photographer captured this phenomenon from Monticello, Maine, with a 4-inch f/7 refractor and Nikon DSLR.

The post Horns of the Sun appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • Fram2 astronauts splash down after historic polar spaceflightAlison Klesman
    The first astronaut crew to fly directly over Earth’s poles splashed down safely on Friday after nearly four days on orbit. Civilian astronauts Chun Wang, Jannicke Mikkelsen, Rabea Rogge, and Eric Phillips — the international crew of SpaceX’s private Fram2 mission — landed around 12:19 p.m. EDT and exited their SpaceX Dragon capsule without assistance, allowing researchers to study how theContinue reading "Fram2 astronauts splash down after historic polar spaceflight" The post Fram2 astronauts s
     

Fram2 astronauts splash down after historic polar spaceflight

April 5th 2025 at 12:45 am

The first astronaut crew to fly directly over Earth’s poles splashed down safely on Friday after nearly four days on orbit. Civilian astronauts Chun Wang, Jannicke Mikkelsen, Rabea Rogge, and Eric Phillips — the international crew of SpaceX’s private Fram2 mission — landed around 12:19 p.m. EDT and exited their SpaceX Dragon capsule without assistance, allowing researchers to study how theContinue reading "Fram2 astronauts splash down after historic polar spaceflight"

The post Fram2 astronauts splash down after historic polar spaceflight appeared first on Astronomy Magazine.

  • ✇Space
  • HoverAir X1 PRO drone review
    The HoverAir X1 PRO is one of two new ZeroZero Robotics selfie drone models and is the more affordable option of the two with 4K video capture with a host of optional accessories available.
     
  • ✇Astronomy Magazine
  • Curiosity discovers largest organic molecules yet on MarsKorey Haynes
    The Mars Curiosity rover has found the largest organic molecules yet on the Red Planet. Organic molecules are the building blocks of life, although they can also be produced by geological processes. While there’s currently no way to prove whether these particular molecules were formed from processes associated with life, their very discovery shows thatContinue reading "Curiosity discovers largest organic molecules yet on Mars" The post Curiosity discovers largest organic molecules yet on Mars ap
     

Curiosity discovers largest organic molecules yet on Mars

April 4th 2025 at 6:52 pm

The Mars Curiosity rover has found the largest organic molecules yet on the Red Planet. Organic molecules are the building blocks of life, although they can also be produced by geological processes. While there’s currently no way to prove whether these particular molecules were formed from processes associated with life, their very discovery shows thatContinue reading "Curiosity discovers largest organic molecules yet on Mars"

The post Curiosity discovers largest organic molecules yet on Mars appeared first on Astronomy Magazine.

Watch 'potentially hazardous' asteroid fly near Earth this weekend in this free livestream

April 4th 2025 at 5:30 pm
The near-Earth asteroid 2025 BC10 will pass safely near our planet on Saturday (April 5). The Virtual Telescope Project will livestream views of the asteroid's close approach online.

© Asteroid graphic: Gianluca Masi/Virtual Telescope Project. Graphic made in Canva Pro by Daisy Dobrijevic

JWST finds spiral galaxy about 5 times more massive than Milky Way — scientists call it 'Big Wheel'

Scientists have uncovered a massive galaxy that existed just 2 billion years after the Big Bang. But how did this colossal "Big Wheel" form so early in the universe? The answer could change everything we know about galaxy growth.

© NASA/ESA

  • ✇Astronomy Magazine
  • The Sky This Week from April 4 to 11: Catch your last views of UranusAlison Klesman
    Sky This Week is brought to you in part by Celestron. Friday, April 4This evening, the roughly half-illuminated face of the Moon hangs in Gemini, high in the south an hour after sunset. First Quarter Moon occurs at 10:15 P.M. EDT. The two brightest stars in Gemini are Castor (magnitude 1.6) and Pollux (magnitude 1.2).Continue reading "The Sky This Week from April 4 to 11: Catch your last views of Uranus" The post The Sky This Week from April 4 to 11: Catch your last views of Uranus appeared firs
     

The Sky This Week from April 4 to 11: Catch your last views of Uranus

April 4th 2025 at 8:30 am

Sky This Week is brought to you in part by Celestron. Friday, April 4This evening, the roughly half-illuminated face of the Moon hangs in Gemini, high in the south an hour after sunset. First Quarter Moon occurs at 10:15 P.M. EDT. The two brightest stars in Gemini are Castor (magnitude 1.6) and Pollux (magnitude 1.2).Continue reading "The Sky This Week from April 4 to 11: Catch your last views of Uranus"

The post The Sky This Week from April 4 to 11: Catch your last views of Uranus appeared first on Astronomy Magazine.

Extreme magnetic fields near our galaxy's black hole are preventing stars from being born, JWST discovers

April 3rd 2025 at 8:06 pm
New James Webb Space Telescope images of the stellar nursery Sgr C, near the galactic center, reveal why it contains fewer stars than expected.

© NASA, ESA, CSA, STScI, SARAO, Samuel Crowe (UVA), John Bally (CU), Ruben Fedriani (IAA-CSIC), Ian Heywood (Oxford)

The utterly beautiful destruction of a planet: Space photo of the day

The Helix nebula may point to the ultimate fate of our sun — and Earth.

© X-ray: NASA/CXC/SAO/Univ Mexico/S. Estrada-Dorado et al.; Ultraviolet: NASA/JPL; Optical: NASA/ESA/STScI (M. Meixner)/NRAO (T.A. Rector); Infrared: ESO/VISTA/J. Emerson; Image Processing: NASA/CXC/SAO/K. Arcand

  • ✇Astronomy Magazine
  • Megaroc: The British manned space program that almost wasDoug Adler
    As World War II drew to a close, the Allies were eager to get their hands on one of the most technologically amazing yet terrifying weapons in Nazi Germany’s armamentarium: the V-2 rocket. A long-range, liquid-fueled supersonic guided missile, the V-2 could carry a 2,000-pound (910 kilograms) warhead a staggering 200 miles (320 kilometers) fromContinue reading "Megaroc: The British manned space program that almost was" The post Megaroc: The British manned space program that almost was appeared f
     

Megaroc: The British manned space program that almost was

April 3rd 2025 at 6:30 pm

As World War II drew to a close, the Allies were eager to get their hands on one of the most technologically amazing yet terrifying weapons in Nazi Germany’s armamentarium: the V-2 rocket. A long-range, liquid-fueled supersonic guided missile, the V-2 could carry a 2,000-pound (910 kilograms) warhead a staggering 200 miles (320 kilometers) fromContinue reading "Megaroc: The British manned space program that almost was"

The post Megaroc: The British manned space program that almost was appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • Cosmic wingspanMark Zastrow
    Andrei Pleskatsevich, taken from Minsk, Belarus The Seagull Nebula is a region of nebulosity lying on the border between constellations Monoceros and Canis Major; the emission nebula forming the bird’s “head” carries the catalog designation IC 2177. The imager used a 3-inch f/4.5 scope and one-shot color camera to take 10 hours of exposure. The post Cosmic wingspan appeared first on Astronomy Magazine.
     

Cosmic wingspan

April 3rd 2025 at 9:26 am

Andrei Pleskatsevich, taken from Minsk, Belarus The Seagull Nebula is a region of nebulosity lying on the border between constellations Monoceros and Canis Major; the emission nebula forming the bird’s “head” carries the catalog designation IC 2177. The imager used a 3-inch f/4.5 scope and one-shot color camera to take 10 hours of exposure.

The post Cosmic wingspan appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • Spring for new astronomy products this monthAstronomy Staff
    Sky watchers The University of Arizona PressTucson, AZ Star Gazers: Finding Joy in the Night Sky, by prolific astronomy writer David H. Levy, is a collection of personal essays celebrating amateur and professional astronomy. Bringing together his decades of sky-watching experience, this 172-page book gives readers insight into Levy’s thoughts on James Webb Space Telescope,Continue reading "Spring for new astronomy products this month" The post Spring for new astronomy products this month appeare
     

Spring for new astronomy products this month

April 2nd 2025 at 4:30 pm

Sky watchers The University of Arizona PressTucson, AZ Star Gazers: Finding Joy in the Night Sky, by prolific astronomy writer David H. Levy, is a collection of personal essays celebrating amateur and professional astronomy. Bringing together his decades of sky-watching experience, this 172-page book gives readers insight into Levy’s thoughts on James Webb Space Telescope,Continue reading "Spring for new astronomy products this month"

The post Spring for new astronomy products this month appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • FAA concludes Blue Origin, SpaceX January ‘mishap’ investigationsAlison Klesman
    The Federal Aviation Administration has completed its investigations looking into “mishaps” that occurred during Blue Origin’s New Glenn rocket launch and SpaceX’s Starship Flight 7 in January. On Jan. 16, Blue Origin’s New Glenn-1 reached orbit on its debut flight. While the launch was successful, the rocket lost its lower stage during its descent. Later thatContinue reading "FAA concludes Blue Origin, SpaceX January ‘mishap’ investigations" The post FAA concludes Blue Origin, SpaceX January ‘m
     

FAA concludes Blue Origin, SpaceX January ‘mishap’ investigations

April 1st 2025 at 9:30 pm

The Federal Aviation Administration has completed its investigations looking into “mishaps” that occurred during Blue Origin’s New Glenn rocket launch and SpaceX’s Starship Flight 7 in January. On Jan. 16, Blue Origin’s New Glenn-1 reached orbit on its debut flight. While the launch was successful, the rocket lost its lower stage during its descent. Later thatContinue reading "FAA concludes Blue Origin, SpaceX January ‘mishap’ investigations"

The post FAA concludes Blue Origin, SpaceX January ‘mishap’ investigations appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • Debut flight of Isar Aerospace Spectrum rocket ends in explosionMark Zastrow
    he first commercially built rocket to lift off from continental Europe came tumbling back to Earth within seconds. But its manufacturer considers the mission a success. The test flight, “Going Full Spectrum,” was the debut launch of Norwegian company Isar Aerospace’s Spectrum, a two-stage orbital launch vehicle designed to compete with SpaceX’s workhorse Falcon 9Continue reading "Debut flight of Isar Aerospace Spectrum rocket ends in explosion" The post Debut flight of Isar Aerospace Spectrum ro
     

Debut flight of Isar Aerospace Spectrum rocket ends in explosion

April 1st 2025 at 7:18 pm

he first commercially built rocket to lift off from continental Europe came tumbling back to Earth within seconds. But its manufacturer considers the mission a success. The test flight, “Going Full Spectrum,” was the debut launch of Norwegian company Isar Aerospace’s Spectrum, a two-stage orbital launch vehicle designed to compete with SpaceX’s workhorse Falcon 9Continue reading "Debut flight of Isar Aerospace Spectrum rocket ends in explosion"

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  • ✇Astronomy Magazine
  • Earth as a planetDavid J. Eicher
    From the editor: As the extraordinary pace of astronomical discovery carries on, we increasingly see that the stuff of life is spread throughout the cosmos. Life, even complex life, must be common out there. We know of several hundred billion stars in our galaxy, at least 100 billion galaxies, and planets around most of theContinue reading "Earth as a planet" The post Earth as a planet appeared first on Astronomy Magazine.
     

Earth as a planet

April 1st 2025 at 4:30 pm

From the editor: As the extraordinary pace of astronomical discovery carries on, we increasingly see that the stuff of life is spread throughout the cosmos. Life, even complex life, must be common out there. We know of several hundred billion stars in our galaxy, at least 100 billion galaxies, and planets around most of theContinue reading "Earth as a planet"

The post Earth as a planet appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • Solving the climate equationshill
    My childhood fascination with the night sky led me to study astronomy and physics at university. By my second year, I was operating the telescope atop the physics building, tracking celestial objects — just like astronomy student Kate Dibiasky in the disaster movie Don’t Look Up.I never imagined I’d also soon find myself alerting othersContinue reading "Solving the climate equation" The post Solving the climate equation appeared first on Astronomy Magazine.
     

Solving the climate equation

By: shill
April 1st 2025 at 4:29 pm

My childhood fascination with the night sky led me to study astronomy and physics at university. By my second year, I was operating the telescope atop the physics building, tracking celestial objects — just like astronomy student Kate Dibiasky in the disaster movie Don’t Look Up.I never imagined I’d also soon find myself alerting othersContinue reading "Solving the climate equation"

The post Solving the climate equation appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • How to build climate solutions: An interview with Tony FadellMark Zastrow
    In many ways, Tony Fadell built the digital world we live in. At the turn of the millennium, his efforts to build a pocket-sized, hard-disk-based device that could hold 1,000 songs in MP3 format caught the attention of Apple. Within months, he had been hired by the firm, and less than a year after hisContinue reading "How to build climate solutions: An interview with Tony Fadell" The post How to build climate solutions: An interview with Tony Fadell appeared first on Astronomy Magazine.
     

How to build climate solutions: An interview with Tony Fadell

April 1st 2025 at 4:29 pm

In many ways, Tony Fadell built the digital world we live in. At the turn of the millennium, his efforts to build a pocket-sized, hard-disk-based device that could hold 1,000 songs in MP3 format caught the attention of Apple. Within months, he had been hired by the firm, and less than a year after hisContinue reading "How to build climate solutions: An interview with Tony Fadell"

The post How to build climate solutions: An interview with Tony Fadell appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • SpaceX’s Fram2 mission will aim for the polesshill
    Next week, a crew of private astronauts is expected to go where no one has gone before. Chun Wang, the crypto entrepreneur who purchased the Fram2 mission from SpaceX in August, announced Friday that the three-to-five-day sojourn — the first human spaceflight to fly directly over the Earth’s poles — is scheduled to launch fromContinue reading "SpaceX’s Fram2 mission will aim for the poles" The post SpaceX’s Fram2 mission will aim for the poles appeared first on Astronomy Magazine.
     

SpaceX’s Fram2 mission will aim for the poles

By: shill
March 27th 2025 at 6:30 pm

Next week, a crew of private astronauts is expected to go where no one has gone before. Chun Wang, the crypto entrepreneur who purchased the Fram2 mission from SpaceX in August, announced Friday that the three-to-five-day sojourn — the first human spaceflight to fly directly over the Earth’s poles — is scheduled to launch fromContinue reading "SpaceX’s Fram2 mission will aim for the poles"

The post SpaceX’s Fram2 mission will aim for the poles appeared first on Astronomy Magazine.

'What choices do you make when you are turning the moon into cheese?' Author John Scalzi on new novel 'When the Moon Hits Your Eye'

March 26th 2025 at 10:30 pm
John Scalzi cased out the Armstrong Museum before writing "When the Moon Hits Your Eye." The author may have been confused of planning a heist given the way he eyed an Apollo 11 moon rock on display.

© Tor Books

  • ✇Astronomy Magazine
  • German firm eyes Thursday for Europe’s first commercial orbital launchshill
    After a scrubbed test flight on Monday, a German spaceflight company has determined its next opportunity to launch the first commercial orbital launch vehicle from mainland Europe. Munich-based Isar Aerospace postponed the debut launch of its Spectrum rocket, citing unfavorable winds at Norway’s Andøya Spaceport. On Tuesday, Isar said it will now target Thursday atContinue reading "German firm eyes Thursday for Europe’s first commercial orbital launch" The post German firm eyes Thursday for Euro
     

German firm eyes Thursday for Europe’s first commercial orbital launch

By: shill
March 26th 2025 at 9:56 pm

After a scrubbed test flight on Monday, a German spaceflight company has determined its next opportunity to launch the first commercial orbital launch vehicle from mainland Europe. Munich-based Isar Aerospace postponed the debut launch of its Spectrum rocket, citing unfavorable winds at Norway’s Andøya Spaceport. On Tuesday, Isar said it will now target Thursday atContinue reading "German firm eyes Thursday for Europe’s first commercial orbital launch"

The post German firm eyes Thursday for Europe’s first commercial orbital launch appeared first on Astronomy Magazine.

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  • This dead star is still sending us radio signalsAlison Klesman
    Astronomers have finally identified the source of mysterious radio waves from deep space, tracing the signals back to an unusual stellar pair locked in a swift orbit, flashing out their location for the universe to hear. In research published March 12 in Nature Astronomy, a team of astrophysicists finally found the source of strange, minute-longContinue reading "This dead star is still sending us radio signals" The post This dead star is still sending us radio signals appeared first on Astronomy
     

This dead star is still sending us radio signals

March 26th 2025 at 6:39 pm

Astronomers have finally identified the source of mysterious radio waves from deep space, tracing the signals back to an unusual stellar pair locked in a swift orbit, flashing out their location for the universe to hear. In research published March 12 in Nature Astronomy, a team of astrophysicists finally found the source of strange, minute-longContinue reading "This dead star is still sending us radio signals"

The post This dead star is still sending us radio signals appeared first on Astronomy Magazine.

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  • Ghost rivers, hidden lakes: The long search for water on MarsKnowable Magazine
    The quest to send humans to Mars is on: US President Donald Trump talked about it in his inauguration speech this year. Such an epic endeavor could help to answer fundamental questions about the Red Planet, including the biggest question of all: Did Mars once host life — and does it still? Central to thoseContinue reading "Ghost rivers, hidden lakes: The long search for water on Mars" The post Ghost rivers, hidden lakes: The long search for water on Mars appeared first on Astronomy Magazine.
     

Ghost rivers, hidden lakes: The long search for water on Mars

March 26th 2025 at 4:30 pm

The quest to send humans to Mars is on: US President Donald Trump talked about it in his inauguration speech this year. Such an epic endeavor could help to answer fundamental questions about the Red Planet, including the biggest question of all: Did Mars once host life — and does it still? Central to thoseContinue reading "Ghost rivers, hidden lakes: The long search for water on Mars"

The post Ghost rivers, hidden lakes: The long search for water on Mars appeared first on Astronomy Magazine.

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  • Bathed in blueMark Zastrow
    Greg Polanski from Kanata, Ontario, Canada The ever-popular Rosette Nebula (NGC 2237–9/46) lies 10° east of Betelgeuse and is an impressive telescopic sight. Deep imaging reveals the line of dark Bok globules — small dense clouds where baby stars are forming — that appear to lie suspended within the nebula. The imager took 12⅓ hoursContinue reading "Bathed in blue" The post Bathed in blue appeared first on Astronomy Magazine.
     

Bathed in blue

March 26th 2025 at 1:38 am

Greg Polanski from Kanata, Ontario, Canada The ever-popular Rosette Nebula (NGC 2237–9/46) lies 10° east of Betelgeuse and is an impressive telescopic sight. Deep imaging reveals the line of dark Bok globules — small dense clouds where baby stars are forming — that appear to lie suspended within the nebula. The imager took 12⅓ hoursContinue reading "Bathed in blue"

The post Bathed in blue appeared first on Astronomy Magazine.

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  • How do neutrino telescopes work?Alison Klesman
    To detect neutrinos, scientists use vast observatories located underground, shielded from cosmic ray interference. These detectors rely on Cherenkov radiation, a bluish light produced when high-speed muons, created by rare neutrino collisions, travel faster than light through water or ice. Photomultiplier tubes amplify this light, allowing astronomers to trace the neutrino’s path and energy. The post How do neutrino telescopes work? appeared first on Astronomy Magazine.
     

How do neutrino telescopes work?

March 26th 2025 at 12:52 am

To detect neutrinos, scientists use vast observatories located underground, shielded from cosmic ray interference. These detectors rely on Cherenkov radiation, a bluish light produced when high-speed muons, created by rare neutrino collisions, travel faster than light through water or ice. Photomultiplier tubes amplify this light, allowing astronomers to trace the neutrino’s path and energy.

The post How do neutrino telescopes work? appeared first on Astronomy Magazine.

Rare moonbow shines below total lunar eclipse in stunning photo: 'This is definitely the first time I've tried something like this, but will not be the last'

"The respective sizes of the two arcs also create a great symbolic representation of the difference in scale between what we experience and deal with as humans on Earth and the vastness and grandeur of the scale of space and our closest neighbor"

© Billy Buchanan, Narcoleptic Nightscapes

NASA says removal of 'first woman, person of color' language from Artemis websites 'does not indicate' moon mission crew change

March 25th 2025 at 12:04 am
NASA websites no longer state that the Artemis 3 mission will aim to land the first person of color and the first woman on the moon, but the agency says this does not reflect a change in crew.

© NASA

New Barbie doll celebrates 60 years as an astronaut, but forgets when humans first flew into space

March 24th 2025 at 10:30 pm
Earth to astronaut Barbie, we have a new space collectible, but probably not for all of the reasons Mattel intended. The toy company has released a Barbie Miss Astronaut 60th anniversary doll.

© Mattel / collectSPACE.com

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  • Our solar system is not as unusual as we thoughtTheo Nicitopoulos
    Astronomers have discovered more than 300 exoplanetary systems that have three or more known planets. Most of these planets are about the same size and spaced close together, earning them the moniker “peas in a pod.” They also orbit near their stars, in many cases closer than Mercury is to the Sun.  Our solar system,Continue reading "Our solar system is not as unusual as we thought" The post Our solar system is not as unusual as we thought appeared first on Astronomy Magazine.
     

Our solar system is not as unusual as we thought

March 24th 2025 at 10:05 pm

Astronomers have discovered more than 300 exoplanetary systems that have three or more known planets. Most of these planets are about the same size and spaced close together, earning them the moniker “peas in a pod.” They also orbit near their stars, in many cases closer than Mercury is to the Sun.  Our solar system,Continue reading "Our solar system is not as unusual as we thought"

The post Our solar system is not as unusual as we thought appeared first on Astronomy Magazine.

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  • Will Sirius B explode as a type Ia supernova?Astronomy Staff
    Could the nearby star Sirius B explode as a type Ia supernova, like some other white dwarf stars in binary star systems have? Bruce MasonEncinitas, California A type Ia supernova occurs when a white dwarf — the cooling remnant of an aging star — draws hydrogen from a companion sun. When the dwarf reaches 1.4Continue reading "Will Sirius B explode as a type Ia supernova?" The post Will Sirius B explode as a type Ia supernova? appeared first on Astronomy Magazine.
     

Will Sirius B explode as a type Ia supernova?

March 24th 2025 at 9:30 pm

Could the nearby star Sirius B explode as a type Ia supernova, like some other white dwarf stars in binary star systems have? Bruce MasonEncinitas, California A type Ia supernova occurs when a white dwarf — the cooling remnant of an aging star — draws hydrogen from a companion sun. When the dwarf reaches 1.4Continue reading "Will Sirius B explode as a type Ia supernova?"

The post Will Sirius B explode as a type Ia supernova? appeared first on Astronomy Magazine.

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  • This Week in Astronomy with Dave Eicher: A Solar EclipseDavid J. Eicher
    In this episode, Astronomy magazine Editor Dave Eicher invites you to view an unusual event: a partial eclipse of the Sun. Depending on where you are, you might see the Moon cover up to 90 percent of the bright solar disk. Remember, however, even 10 percent of the Sun is dangerous to look at, so wear approvedContinue reading "This Week in Astronomy with Dave Eicher: A Solar Eclipse" The post This Week in Astronomy with Dave Eicher: A Solar Eclipse appeared first on Astronomy Magazine.
     

This Week in Astronomy with Dave Eicher: A Solar Eclipse

March 24th 2025 at 5:27 pm

In this episode, Astronomy magazine Editor Dave Eicher invites you to view an unusual event: a partial eclipse of the Sun. Depending on where you are, you might see the Moon cover up to 90 percent of the bright solar disk. Remember, however, even 10 percent of the Sun is dangerous to look at, so wear approvedContinue reading "This Week in Astronomy with Dave Eicher: A Solar Eclipse"

The post This Week in Astronomy with Dave Eicher: A Solar Eclipse appeared first on Astronomy Magazine.

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  • Cosmic fledglingMark Zastrow
    Greg Meyer from Phoenix, Arizona This dusty figure of the Baby Eagle Nebula (LBN 777) is part of the larger Taurus Molecular Cloud. The dust is dimly lit by young stars within the cloud; the brownish color gives away the presence of larger dust grains. This image comprises nearly 24 hours of LRGB exposure withContinue reading "Cosmic fledgling" The post Cosmic fledgling appeared first on Astronomy Magazine.
     

Cosmic fledgling

March 22nd 2025 at 10:26 pm

Greg Meyer from Phoenix, Arizona This dusty figure of the Baby Eagle Nebula (LBN 777) is part of the larger Taurus Molecular Cloud. The dust is dimly lit by young stars within the cloud; the brownish color gives away the presence of larger dust grains. This image comprises nearly 24 hours of LRGB exposure withContinue reading "Cosmic fledgling"

The post Cosmic fledgling appeared first on Astronomy Magazine.

China now has a 'kill mesh' in orbit, Space Force vice chief says

March 22nd 2025 at 12:30 am
"That capability gap is significantly narrowed, and we've got to change the way we're looking at space, or that capability gap may reverse and not be in our favor anymore."

© <a href="https://www.youtube.com/@mcaleeseandassociates7933">McAleese and Associates</a>

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  • Our near galactic neighbor might have a supermassive black holeKorey Haynes
    The Large Magellanic Cloud (LMC) is one of the Milky Way’s closest neighbors. It’s a small, irregular galaxy that orbits the Milky Way, and is an easy naked-eye object from the Southern Hemisphere. As one of the only galaxies outside our own where telescopes can resolve individual stars and small scale structures, astronomers love toContinue reading "Our near galactic neighbor might have a supermassive black hole" The post Our near galactic neighbor might have a supermassive black hole appeared
     

Our near galactic neighbor might have a supermassive black hole

March 21st 2025 at 10:35 pm

The Large Magellanic Cloud (LMC) is one of the Milky Way’s closest neighbors. It’s a small, irregular galaxy that orbits the Milky Way, and is an easy naked-eye object from the Southern Hemisphere. As one of the only galaxies outside our own where telescopes can resolve individual stars and small scale structures, astronomers love toContinue reading "Our near galactic neighbor might have a supermassive black hole"

The post Our near galactic neighbor might have a supermassive black hole appeared first on Astronomy Magazine.

Stellar nursery sparkles at the edge of our galaxy in gorgeous Hubble Telescope image

March 21st 2025 at 4:30 pm
The emission nebula, known as Sh2-284, is an immense region of gas and dust that fuels new star formation. It lacks elements heavier than hydrogen and helium, much like the environment of the early universe.

© NASA, ESA, and M. Andersen (European Southern Observatory - Germany); Processing: Gladys Kober (NASA/Catholic University of America)

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  • The Sky This Week from March 21 to 28: Galilean moon actionAlison Klesman
    Sky This Week is brought to you in part by Celestron. Friday, March 21By 10 P.M. local daylight time, the constellation Canes Venatici the Hunting Dogs is some 45° high in the east. Nestled under the curve of the Big Dipper’s handle, this seemingly innocuous star pattern hosts several popular deep-sky objects.  One of thoseContinue reading "The Sky This Week from March 21 to 28: Galilean moon action" The post The Sky This Week from March 21 to 28: Galilean moon action appeared first on Astronomy
     

The Sky This Week from March 21 to 28: Galilean moon action

March 21st 2025 at 8:30 am

Sky This Week is brought to you in part by Celestron. Friday, March 21By 10 P.M. local daylight time, the constellation Canes Venatici the Hunting Dogs is some 45° high in the east. Nestled under the curve of the Big Dipper’s handle, this seemingly innocuous star pattern hosts several popular deep-sky objects.  One of thoseContinue reading "The Sky This Week from March 21 to 28: Galilean moon action"

The post The Sky This Week from March 21 to 28: Galilean moon action appeared first on Astronomy Magazine.

  • ✇اسطرلاب (StarYab)
  • یافتن کهکشان‌های کوتوله‌ی خاموش‌ در خلوت‌ترین نقاط کیهانبهار بیداران
    چه چیزی باعث از بین رفتن توان ستاره‌زایی در کهکشان‌های کم‌جرم یا کوتوله می‌شود؟ این سوالی است که منجمان مدت‌ها معتقد بودند پاسخ دقیق به آن را یافته‌اند، اما نتایج جدید نشان می‌دهد که ما هنوز از تصویری دقیق و واقع‌بینانه دور هستیم. کهکشان‌های کوتوله، که جرم ستاره‌ای آن‌ها حدود یک تا دو میلیارد برابر جرم خورشید یا کم‌تر است، از رایج‌ترین انواع کهکشان‌ها در کیهان محسوب می‌شوند. به عنوان مثال، در گروه محلی۱ بیش از ۶۰ کهکشان کوتوله وجود دارد و این تعداد، با بهتر شدن حساسیت تلسکوپ‌ها، روز به روز در حا
     

یافتن کهکشان‌های کوتوله‌ی خاموش‌ در خلوت‌ترین نقاط کیهان

March 12th 2025 at 4:16 am

چه چیزی باعث از بین رفتن توان ستاره‌زایی در کهکشان‌های کم‌جرم یا کوتوله می‌شود؟ این سوالی است که منجمان مدت‌ها معتقد بودند پاسخ دقیق به آن را یافته‌اند، اما نتایج جدید نشان می‌دهد که ما هنوز از تصویری دقیق و واقع‌بینانه دور هستیم.

کهکشان‌های کوتوله، که جرم ستاره‌ای آن‌ها حدود یک تا دو میلیارد برابر جرم خورشید یا کم‌تر است، از رایج‌ترین انواع کهکشان‌ها در کیهان محسوب می‌شوند. به عنوان مثال، در گروه محلی۱ بیش از ۶۰ کهکشان کوتوله وجود دارد و این تعداد، با بهتر شدن حساسیت تلسکوپ‌ها، روز به روز در حال افزایش است. داده‌های رصدی وجود تعداد زیادی از کهکشان‌های کوتوله‌ی قرمز و خاموش۲ در مراکز پرتراکم کیهان مانند مرکز گروه‌ها و خوشه‌های کیهانی را تایید می‌کند، در حالی‌که کهکشان‌هایی که در محیط‌های خلوت‌تر (مانند اطراف گروه محلی یا در محیط‌هایی خارج از خوشه‌ها) رصد شده‌اند، غالبا حاوی گاز و در حال ستاره‌زایی هستند. بر اساس این مشاهدات این باور کلی به وجود آمده است که محیط تنها عامل خاموش‌شدن ستاره‌زایی در کهکشان‌های کوتوله است.

زمانی که یک کهکشان با سرعت زیاد درون محیط متراکم و داغ گاز خوشه‌ای حرکت می‌کند، تحت نیرویی به نام فشار ترمزی۳ قرار می گیرد. این نیرو در اثر برخورد و حرکت کهکشان در میان گاز میان خوشه‌ای، بر آن اعمال می‌شود و می‌تواند گاز سرد درون کهکشان را از آن خارج کند. هر چقدر جرم کهکشان بیش‌تر باشد، چاه پتانسیل عمیق‌تری خواهد داشت و خارج کردن گاز سرد از آن سخت‌تر خواهد بود. چاه پتانسیل کم‌عمق کهکشان‌های کوتوله، آن‌ها را به یک قربانی بسیار ساده برای محیط‌های متراکم و شلوغ کیهان تبدیل می‌کند. مثال بارز این پدیده، کهکشان کوتوله‌ی مسیه ۱۱۰ در فاصله ۲/۷۱ میلیون سال نوری از خورشید است. این کهکشان کوتوله حدود چند میلیارد سال قبل، یعنی درست زمانی که وارد خوشه‌ی محلی می‌شده‌است، تمامی گاز خود را از دست داده‌است. مسیه ۱۱۰ امروز یک کهکشان کوتوله‌ی خاموش است که با نور قرمز و توزیع نوری کاملا یکنواخت، در تصاویر نجومی خودنمایی می‌کند.

چرا درک بهتر فرایند خاموش‌شدن کهکشان‌های کوتوله تا این اندازه اهمیت دارد؟ پاسخ ساده به این سوال این است که هر آن‌چه که بتواند ستاره‌زایی را در کهکشان‌های کوتوله متوقف کند، می‌تواند (با نسبت‌های متغیر) سبب خاموش‌شدن کهکشان‌های بزرگ‌تر نیز شود. در واقع، مطالعه‌ی آغاز و پایان ستاره‌زایی در این کهکشان‌ها می‌تواند یک تصویر دقیق از تمامی فرایندهایی که ستاره‌زایی در کهکشان‌ها را مدیریت می‌کند، ارائه دهد. از طرف دیگر، بر اساس مدل استاندارد کیهان‌شناسی Lambda-CDM، این کهکشان‌های کوتوله (یا نمونه‌های هم‌جرم آن‌ها) بودند که ابتدا در عالم شکل گرفتند و سپس، با ادغام‌شدن، کهکشان‌های بزرگ‌تر را شکل دادند. بنابراین، درک بهتر این کهکشان‌ها در واقع درک بهتر آجرهایی است که عالم امروزی را بنا کرده‌اند.

در جستجوی کوتوله‌های خاموش و منزوی!

اگر محیط تنها عامل خاموش‌شدن ستاره‌زایی در کهکشان‌های کوتوله باشد، بنابراین هیچ کهکشان کوتوله‌ی خاموشی نباید در کم‌تراکم‌ترین نقاط کیهان، یعنی تهی‌جاها۴ و رشته‌های کیهانی۵ وجود داشته باشد. تهی‌جاهای کیهانی مناطق وسیعی از کیهان، با ابعاد حدودی ۱۰ تا ۱۰۰ مگاپارسک، هستند که در مقایسه با خوشه‌های کهکشانی، چگالی ماده‌ی بسیار کم‌تری دارند. رشته‌های کیهانی در مرز میان تهی‌جاها قرار گرفته‌اند. برای راستی‌آزمایی این فرضیه، ما به سراغ ۴۲ تهی‌جای کیهانی در بازه‌ی انتقال به سرخ ۰/۰۰۵ تا ۰/۰۵، که کاتالوگ آن‌ها توسط تیم CAVITY جمع‌آوری شده‌است، رفته‌ایم. برای بررسی کوتوله‌ها در رشته‌های کیهانی نیز از کاتالوگ کهکشان‌های رشته‌ای Dominguez-Gomez et al. 2023 استفاده کردیم. هدف ما پیداکردن تنهاترین کوتوله‌ها در کم‌تراکم‌ترین نقاط کیهان بود. بنابراین، کهکشان‌های کوتوله‌ای را در این تهی‌جاها و رشته‌ها انتخاب کردیم که هیچ کهکشان همسایه‌ای، تا فاصله‌ی ۱ مگاپارسکی، از آن‌ها حضور نداشته باشد. دلیل این انتخاب، مطالعاتی هستند که ثابت کرده‌اند یکی از علت‌های خاموشی در کهکشان‌های کوتوله، نزدیکی یا همسایگی با کهکشان‌های دیگر است. سپس در این مطالعه به بررسی تاریخچه‌ی ستاره‌زایی در این کهکشان‌ها با کمک تکنیک‌های طیف‌سنجی، با استفاده از داده‌های طیفی Sloan Digital Sky Survey پرداختیم. طیف‌سنجی یک ابزاری کلیدی و دقیق برای بررسی کهکشان‌هاست و به ما کمک می‌کند تا تخمینی از سن، درصد فراوانی آهن (عناصر سنگین‌تر از هلیوم) و روند ستاره‌زایی در کهکشان ‌داشته باشیم.

شکل ۱. گروهی کمیاب از کهکشان‌های کوتوله‌ی خاموش و منزوی در تهی‌جاها و رشته های کیهانی.

این جستجو سبب شد تا ما گروهی کمیاب از کهکشان‌های کوتوله‌ی پرجرم  و  خاموش را پیدا کنیم که در تنهاترین و کم‌چگال‌ترین نقاط کیهان حضور دارند. ستاره‌زایی در این کهکشان‌ها بیش از ۲ میلیارد سال پیش متوقف شده‌است و هیچ گازی در این کهکشان‌ها وجود ندارد. این کهکشان‌ها از نظر برخی خصوصیات مانند اندازه و جرم، تفاوتی با سایر کهکشان‌های کوتوله‌ی خاموش در خوشه‌ها ندارند، اما وجه مشترک تمامی آن‌ها، میزبانی از خوشه‌های ستاره‌ای هسته‌ای۶ است. خوشه‌های ستاره‌ای هسته‌ای، مجموعه‌ای فشرده از ستارگان هستند که در مرکز بسیاری از کهکشان‌ها، از جمله کهکشان‌های کوتوله و حتی در راه شیری پیدا می‌شوند. این خوشه‌ها از لحاظ جرم و چگالی، درخشان‌ترین و متراکم‌ترین خوشه‌های ستاره‌ای در کهکشان میزبان خود محسوب می‌شوند.

در شکل ۲، ما تاریخچه‌ی ستاره‌زایی این کهکشان‌ها را با نمونه‌های مشابه (از نظر جرم) در خوشه‌های بزرگ کیهانی مقایسه کردیم. آن‌چه که قابل توجه است، شباهت میزان ستاره‌زایی در برخی از این کهکشان‌های کوتوله‌ی خاموش‌ در تهی‌جاها و رشته‌ها با گروهی از کهکشان‌های کوتوله‌ است که امروزه در مرکز خوشه‌های کیهانی قرار دارند. کهکشانی که امروز در مرکز یک خوشه‌ی کیهانی قرار داشته باشد، بیش از ۵ میلیارد سال را در آن خوشه زندگی کرده‌است و این به معنای قرارگرفتن در معرض تمامی محرک‌های محیطی برای بیش از ۵ میلیارد سال است. به بیان دیگر، ما شاهد دو گروه از کهکشان‌های کوتوله در محیط‌هایی کاملا متفاوت با فعالیت‌های ستاره‌زایی کاملا مشابه هستیم. هر دو گروه بیش از ۴ میلیارد سال پیش به ستاره‌زایی خود خاتمه داده‌اند. از سویی دیگر، کهکشان‌های کوتوله‌ای که امروزه در اطراف خوشه‌ها قرار دارند (یعنی مدت زمان بسیار کمی را در معرض محرک‌های محیطی بوده‌اند) اما حضور یک خوشه ستاره‌ای هسته‌ای در آن‌ها تایید شده‌است، در ستاره‌زایی، رفتاری مشابه با کهکشان‌های خاموش تهی‌جاای و رشته‌ای دارند. سوالی که پیش می‌آید این است: در نبود محرک‌های محیطی، چه چیزی سبب از بین رفتن ستاره‌زایی در این کهکشان‌ها می‌شود؟

شکل ۲. نمودار درصد جرم ستاره‌ای تشکیل‌شده در کهکشان‌ها بر حسب زمان. در تصویر فوق، متوسط فعالیت‌ ستاره‌زایی کهکشان‌های کوتوله‌ی خاموش و منزوی (نشان داده شده با خطوط ممتد) را با فعالیت ستاره‌زایی کهکشان‌های کوتوله‌ی خاموش خوشه‌ای مقایسه کرده‌ایم. کهکشان‌های کوتوله‌ای که در مرکز خوشه‌ها قرار دارند با خط‌چین و کهکشان‌های کوتوله‌ای که در خوشه‌ها، میزبان خوشه‌های ستاره‌ای هسته‌ای هستند، با نقطه‌چین مشخص شده‌اند. خطوط بنفش کهکشا‌‌ن‌هایی که ستاره‌زایی سریعی داشته‌اند و خطوط صورتی کهکشان‌هایی که هاله و جمعیت ستاره‌ای خود را در بازه‌ی زمانی طولانی‌تری شکل داده‌اند، نمایش می‌دهد.

خاموشی در حضور سیاهچاله‌ها؟

در سال های اخیر، فعالیت‌ هسته‌های کهکشانی فعال۷ به عنوان یکی از فرآیندهای خاموشی ستاره‌ای در کهکشان‌های کوتوله مورد بحث بوده‌است. فعالیت هسته‌ای کهکشانی فعال به فعالیت‌های شدید و پرانرژی در مرکز برخی از کهکشان‌ها اطلاق می‌شود که معمولا ناشی از حضور یک سیاه‌چاله‌ی پرجرم است. یک سیاه‌چاله با جذب ماده، انرژی زیادی را به صورت تابش در طول موج‌های مختلف تابش می‌کند. این تابش با افزایش دمای گاز میان‌ستاره‌ای و به بیرون راندن بخشی از این گاز، به خاموشی فعالیت ستاره‌زایی در کهکشان‌ منجر می‌شود. بر اساس داده‌های موجود، ما نتوانستیم حضور یا عدم حضور سیاه‌چاله در مرکز این کهکشان‌های کوتوله‌ی خاموش‌ را تایید کنیم. از آن‌جایی که در این بازه‌ی جرمی، معمولا یافتن سیاهچاله‌های مرکزی و تمیزدادن آن‌ها از خوشه‌های ستاره‌ای هسته‌ای کار دشواری است، برای بررسی و مطالعه‌ی این موضوع به داده‌های رصدی بهتری نیاز است.

خودکشی کهکشان‌ها با ستاره‌زایی؟

مطالعات اخیر ثابت کرده‌اند که کهکشان‌ها، فارغ از جرم و محل سکونتشان، دو نوع ستاره‌زایی را در طول زندگی خود تجربه می‌کنند: ستاره‌زایی کوتاه‌مدت و بلندمدت. در شکل ۲، این دوگانگی در فعالیت ستاره‌زایی، حتی در یک نمونه‌ی کوچک کهکشان‌های خاموش‌ تهی‌جاای و رشته‌ای، مشهود است.

کهکشان‌هایی که هاله و جمعیت ستاره‌ای خود را خیلی سریع شکل می‌دهند، فارغ از محیط امروزی‌شان، رفتار ستاره‌زایی مشابهی دارند. این امر در مقایسه‌ی بین کهکشان‌های تهی‌جا و خوشه‌ای در شکل ۲، قابل تشخیص است. این بدان معناست که این کهکشان‌ها در یک بازه‌ی زمانی خیلی کوتاه، بخش بزرگی از جمعیت ستاره‌ای خود را تشکیل داده‌اند. ستاره‌زایی در این بازه‌ی کوتاه، به معنای تشکیل بادهای ستاره‌ای  و فعالیت‌های ابرنواختری۸ شدید است. این فعالیت‌ها می‌توانند با افزایش دمای گاز میان ستاره‌ای و به بیرون راندن بخش زیادی از گاز، سبب خاموش شدن کهکشان‌های کوتوله شوند. البته نقش کلیدی بادهای ستاره‌ای در خاموشی کهکشان‌های کوتوله‌ی کم جرم تا به حال اثبات شده است اما نقش این فرایند برای کهکشان‌های کوتوله‌ی پرجرم، هنوز به درستی درک نشده‌است. ستاره‌زایی شدید، فعالیت‌های ابرنواختری و بادهای ستاره‌ای پس از آن، می‌توانند سبب خاموشی کهکشان‌های کوتوله در تهی‌جاها و حتی در مرکز خوشه‌های کیهانی شوند اما بررسی دقیق‌تر این موضوع، منوط به بررسی داده های دقیق‌تر و مناسب‌تر است.

همچنین کهکشان‌های کوتوله‌ای که هاله و جمعیت ستاره‌ای خود را در بازه‌ی زمانی طولانی‌تری ساخته‌اند، اما میزبان یک خوشه‌ی ستاره‌ای هسته‌ای هستند، فارغ از محیطی که در آن زندگی می کنند رفتار ستاره‌زایی مشابهی را از خود نشان می‌دهند. این امر می‌تواند بدان معنا باشد که شکل‌گیری یا حضور یک خوشه‌ی ستاره‌ای هسته‌ای ممکن است به خاموشی کهکشان‌های کوتوله‌ی میزبان منجر شود. از یک زاویه‌ی دیگر، می‌توان گفت که شکل‌گیری خوشه‌ی ستاره‌ای هسته‌ای، خود نتیجه‌ی یک فرآیند خاموشی (مثل انفجارهای ابرنواختری یا حضور فعالیت‌های هسته‌ای کهکشانی) است و پیدا کردن آن‌ها، مانند یافتن رد پای فرآیندهای خاموشی، به غیر از محرک‌های محیطی، در این کهکشان‌هاست.

آن‌چه که سبب خاموشی کهکشان‌های کوتوله‌ی پرجرم منزوی۹ در تهی‌جاها و رشته‌ها شده‌است، هنوز برای ما مشخص نیست. در این مقاله و با استناد به داده‌ها و نتایجی که به‌دست آوردیم، تنها می‌توانستیم حدس‌هایی را در خصوص فرآیندهای مسئول ارائه دهیم و یافتن پاسخ دقیق‌تر، وابسته به ارزیابی و بررسی داده‌های بهتر است. یافتن این جمعیت بسیار کمیاب از کهکشان‌های کوتوله‌ی خاموش‌ در انزوا بدان معناست که بر خلاف باورهای رایج قبلی، محیط تنها عامل خاموشی کهکشان‌های کوتوله نیست و ما هنوز از یک تصویر واقع‌بینانه از فیزیک باریونی در کهکشان‌ها و فرایند‌های مسئول در خاموشی کهکشان‌های کوتوله بسیار فاصله داریم.

۱. Local group
۲. Quenched
۳. Ram pressure
۴. Voids
۵. Filaments
۶. Nuclear star cluster
۷. Active galactic nuclei
۸. Supernova feedback
۹. Isolated dwarf galaxy

شکل بالای صفحه: کهکشان کوتوله‌ی مسیه ۱۱۰ در فاصله ۲/۷۱ میلیون سال نوری از خورشید. منبع: https://www.starkeeper.it/M110.htm

عنوان اصلی مقاله: The Puzzle of isolated and quenched dwarf galaxies in cosmic voids

نویسندگان: .Bahar Bidaran et al.

لینک اصلی مقاله: https://arxiv.org/pdf/2408.05273

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March 18th 2025 at 9:30 pm

Powering spacecraft with solar energy may not seem like a challenge, given how intense the Sun’s light can feel on Earth. Spacecraft near the Earth use large solar panels to harness the Sun for the electricity needed to run their communications systems and science instruments. However, the farther into space you go, the weaker theContinue reading "Inside radioisotope generators, the ‘nuclear batteries’ that power faraway spacecraft"

The post Inside radioisotope generators, the ‘nuclear batteries’ that power faraway spacecraft appeared first on Astronomy Magazine.

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  • M17 stars in a cosmic vistaRichard Talcott
    You could forgive M17 for having an identity crisis. Observers refer to this emission region as the Omega, the Swan, and even the Checkmark Nebula. M17 doesn’t even know what constellation to call home — most of it lies in Sagittarius, but its northern edge crosses into Serpens. Yet no one can deny the stellarContinue reading "M17 stars in a cosmic vista" The post M17 stars in a cosmic vista appeared first on Astronomy Magazine.
     

M17 stars in a cosmic vista

March 18th 2025 at 4:30 pm

You could forgive M17 for having an identity crisis. Observers refer to this emission region as the Omega, the Swan, and even the Checkmark Nebula. M17 doesn’t even know what constellation to call home — most of it lies in Sagittarius, but its northern edge crosses into Serpens. Yet no one can deny the stellarContinue reading "M17 stars in a cosmic vista"

The post M17 stars in a cosmic vista appeared first on Astronomy Magazine.

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  • From dusk til dawnMark Zastrow
    Marco Wong from Redhill, U.K. The Milky Way arches over the Cuckmere River in Sussex, U.K., in this blended panorama. The imager used a Canon DSLR and captured the sky panels with a 28mm f/1.4 and with exposures of 52 seconds at ISO 800; the foreground panels were captured with a 13mm f/2.8 lens atContinue reading "From dusk til dawn" The post From dusk til dawn appeared first on Astronomy Magazine.
     

From dusk til dawn

March 18th 2025 at 4:27 pm

Marco Wong from Redhill, U.K. The Milky Way arches over the Cuckmere River in Sussex, U.K., in this blended panorama. The imager used a Canon DSLR and captured the sky panels with a 28mm f/1.4 and with exposures of 52 seconds at ISO 800; the foreground panels were captured with a 13mm f/2.8 lens atContinue reading "From dusk til dawn"

The post From dusk til dawn appeared first on Astronomy Magazine.

What time will NASA's Starliner astronauts land with SpaceX's Crew-9 today? How to watch live.

March 18th 2025 at 12:30 pm
SpaceX is poised to land its Crew Dragon Freedom with the two ISS crewmates who launched on it and two astronauts who arrived at the space station in June on Boeing's Starliner. Here's how to see it.

© NASA

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  • Firefly’s Blue Ghost lander nails lunar missionRobert Reeves
    The Blue Ghost lunar lander finished surface operations on March 16, 2025, wrapping up a smashing success of a mission. Designed, built, and flown by Firefly Aerospace, based near Austin, Texas, Blue Ghost executed a flawless two-month-long voyage, capped by a stunning landing and two weeks of operations at Mare Crisium. The success of theContinue reading "Firefly’s Blue Ghost lander nails lunar mission" The post Firefly’s Blue Ghost lander nails lunar mission appeared first on Astronomy Magazin
     

Firefly’s Blue Ghost lander nails lunar mission

March 18th 2025 at 6:51 am

The Blue Ghost lunar lander finished surface operations on March 16, 2025, wrapping up a smashing success of a mission. Designed, built, and flown by Firefly Aerospace, based near Austin, Texas, Blue Ghost executed a flawless two-month-long voyage, capped by a stunning landing and two weeks of operations at Mare Crisium. The success of theContinue reading "Firefly’s Blue Ghost lander nails lunar mission"

The post Firefly’s Blue Ghost lander nails lunar mission appeared first on Astronomy Magazine.

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  • What is the difference between a 2″ eyepiece and a 1¼” eyepiece?Astronomy Staff
    What is the benefit of a 2″ eyepiece compared to a 1¼” eyepiece? Tom NagyNorth Ridgeville, Ohio A 2″ eyepiece delivers a wider true field of view (the actual amount of sky visible) than a 1¼” eyepiece of the same focal length. Two factors determine the true field: the telescope’s focal length and the diameterContinue reading "What is the difference between a 2″ eyepiece and a 1¼” eyepiece?" The post What is the difference between a 2″ eyepiece and a 1¼” eyepiece? appeared first on Astronomy Maga
     

What is the difference between a 2″ eyepiece and a 1¼” eyepiece?

March 17th 2025 at 9:30 pm

What is the benefit of a 2″ eyepiece compared to a 1¼” eyepiece? Tom NagyNorth Ridgeville, Ohio A 2″ eyepiece delivers a wider true field of view (the actual amount of sky visible) than a 1¼” eyepiece of the same focal length. Two factors determine the true field: the telescope’s focal length and the diameterContinue reading "What is the difference between a 2″ eyepiece and a 1¼” eyepiece?"

The post What is the difference between a 2″ eyepiece and a 1¼” eyepiece? appeared first on Astronomy Magazine.

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  • Observe the brightest deep-sky objectsMichael E. Bakich
    You know, after decades of pointing optics toward the sky, I consider myself a knowledgeable observer. But while researching the Pleiades a few months back, I was surprised to learn that it wasn’t the brightest star cluster. And there were other surprises when I started comparing overall brightnesses of deep-sky objects. For instance, you mightContinue reading "Observe the brightest deep-sky objects" The post Observe the brightest deep-sky objects appeared first on Astronomy Magazine.
     

Observe the brightest deep-sky objects

March 17th 2025 at 6:30 pm

You know, after decades of pointing optics toward the sky, I consider myself a knowledgeable observer. But while researching the Pleiades a few months back, I was surprised to learn that it wasn’t the brightest star cluster. And there were other surprises when I started comparing overall brightnesses of deep-sky objects. For instance, you mightContinue reading "Observe the brightest deep-sky objects"

The post Observe the brightest deep-sky objects appeared first on Astronomy Magazine.

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  • SpaceX proposal would more than double Falcon 9 launches at Cape Canaveralshill
    SpaceX, the world’s dominant commercial space launch provider, is looking to ramp up the activity of its workhorse rocket. The FAA on Friday released a draft environmental assessment (EA) analyzing the company’s proposal to more than double the number of Falcon 9 launches from Space Launch Complex 40 (SLC-40) at Cape Canaveral Space Force StationContinue reading "SpaceX proposal would more than double Falcon 9 launches at Cape Canaveral" The post SpaceX proposal would more than double Falcon 9 l
     

SpaceX proposal would more than double Falcon 9 launches at Cape Canaveral

By: shill
March 17th 2025 at 6:19 pm

SpaceX, the world’s dominant commercial space launch provider, is looking to ramp up the activity of its workhorse rocket. The FAA on Friday released a draft environmental assessment (EA) analyzing the company’s proposal to more than double the number of Falcon 9 launches from Space Launch Complex 40 (SLC-40) at Cape Canaveral Space Force StationContinue reading "SpaceX proposal would more than double Falcon 9 launches at Cape Canaveral"

The post SpaceX proposal would more than double Falcon 9 launches at Cape Canaveral appeared first on Astronomy Magazine.

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  • This Week in Astronomy with Dave Eicher: The Planets AlignDavid J. Eicher
    In this episode, Astronomy magazine Editor Dave Eicher invites you to head out soon and look at the planets in the evening sky. The highest is Mars, the so-called Red Planet. The giant planet Jupiter is a bit lower but much brighter. Brightest of all is Venus, low in the west. If you want to see thatContinue reading "This Week in Astronomy with Dave Eicher: The Planets Align" The post This Week in Astronomy with Dave Eicher: The Planets Align appeared first on Astronomy Magazine.
     

This Week in Astronomy with Dave Eicher: The Planets Align

March 17th 2025 at 6:04 pm

In this episode, Astronomy magazine Editor Dave Eicher invites you to head out soon and look at the planets in the evening sky. The highest is Mars, the so-called Red Planet. The giant planet Jupiter is a bit lower but much brighter. Brightest of all is Venus, low in the west. If you want to see thatContinue reading "This Week in Astronomy with Dave Eicher: The Planets Align"

The post This Week in Astronomy with Dave Eicher: The Planets Align appeared first on Astronomy Magazine.

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