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Today — November 27th 2024فیزیک و مهندسی
Yesterday — November 26th 2024فیزیک و مهندسی
  • ✇Astronomy Magazine
  • NASA picks SpaceX, Blue Origin to fly lunar rover and habitat to the MoonAlison Klesman
    NASA has picked SpaceX and Blue Origin to deliver a lunar rover and habitat to the moon within the next decade. The space agency last week announced it will assign two lunar cargo demonstration missions—one to each partner—under the companies’ contracts to build human landing systems (HLS) for the Artemis moon mission program. SpaceX and Blue Origin are working under multibillion-dollar dealsContinue reading "NASA picks SpaceX, Blue Origin to fly lunar rover and habitat to the Moon" The post NAS
     
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NASA picks SpaceX, Blue Origin to fly lunar rover and habitat to the Moon

✇Astronomy Magazine
By: Alison Klesman
November 26th 2024 at 10:00 pm

NASA has picked SpaceX and Blue Origin to deliver a lunar rover and habitat to the moon within the next decade. The space agency last week announced it will assign two lunar cargo demonstration missions—one to each partner—under the companies’ contracts to build human landing systems (HLS) for the Artemis moon mission program. SpaceX and Blue Origin are working under multibillion-dollar dealsContinue reading "NASA picks SpaceX, Blue Origin to fly lunar rover and habitat to the Moon"

The post NASA picks SpaceX, Blue Origin to fly lunar rover and habitat to the Moon appeared first on Astronomy Magazine.

'Flame-throwing' Guitar Nebula's concert caught by Hubble and Chandra space telescopes (video)

✇Space
November 26th 2024 at 8:30 pm
NASA telescope spotted a glowing nebula that looks like a guitar shredding rapid pulses of stellar material through space like soundwaves through a packed concert stadium.

© X-ray: NASA/CXC/Stanford Univ./M. de Vries et al.; Optical: (Hubble) NASA/ESA/STScI and (Palomar) Hale Telescope/Palomar/CalTech; Image Processing: NASA/CXC/SAO/L. Frattare

  • ✇Astronomy Magazine
  • This black hole is gulping material 40 times faster than the theoretical limitMark Zastrow
    For decades, astronomers have puzzled over how the supermassive black holes residing in the center of galaxies form. Now, researchers may have found the biggest clue yet to how these monstrous objects — weighing millions of solar masses — came to exist.  An international team used the James Webb Space Telescope’s (JWST) high sensitivity toContinue reading "This black hole is gulping material 40 times faster than the theoretical limit" The post This black hole is gulping material 40 times faster
     
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This black hole is gulping material 40 times faster than the theoretical limit

✇Astronomy Magazine
By: Mark Zastrow
November 26th 2024 at 8:09 pm

For decades, astronomers have puzzled over how the supermassive black holes residing in the center of galaxies form. Now, researchers may have found the biggest clue yet to how these monstrous objects — weighing millions of solar masses — came to exist.  An international team used the James Webb Space Telescope’s (JWST) high sensitivity toContinue reading "This black hole is gulping material 40 times faster than the theoretical limit"

The post This black hole is gulping material 40 times faster than the theoretical limit appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • On the plateMark Zastrow
    Michael Sussman/Warren Keller The Fish Head Nebula (IC 1795) lies at the corner of the Heart Nebula (Sharpless 2–190) in Cassiopeia, forming a large stellar nursery laced with dark dust lanes. The imagers collected 27.6 hours of data in SHO filters with a 5-inch scope. The post On the plate appeared first on Astronomy Magazine.
     
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On the plate

✇Astronomy Magazine
By: Mark Zastrow
November 26th 2024 at 5:28 pm

Michael Sussman/Warren Keller The Fish Head Nebula (IC 1795) lies at the corner of the Heart Nebula (Sharpless 2–190) in Cassiopeia, forming a large stellar nursery laced with dark dust lanes. The imagers collected 27.6 hours of data in SHO filters with a 5-inch scope.

The post On the plate appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • Uranus and Neptune have weird magnetic fields — this might be whyAlison Klesman
    In 1986 and 1989, Voyager 2 made the final two stops on its grand tour of the outer solar system when it swept by Uranus and Neptune, respectively. Now, nearly 40 years later, the archive of data the craft collected is still returning unexpected results.  In a paper published today in PNAS, astronomer Burkhard MilitzerContinue reading "Uranus and Neptune have weird magnetic fields — this might be why" The post Uranus and Neptune have weird magnetic fields — this might be why appeared first on As
     
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Uranus and Neptune have weird magnetic fields — this might be why

✇Astronomy Magazine
By: Alison Klesman
November 25th 2024 at 11:30 pm

In 1986 and 1989, Voyager 2 made the final two stops on its grand tour of the outer solar system when it swept by Uranus and Neptune, respectively. Now, nearly 40 years later, the archive of data the craft collected is still returning unexpected results.  In a paper published today in PNAS, astronomer Burkhard MilitzerContinue reading "Uranus and Neptune have weird magnetic fields — this might be why"

The post Uranus and Neptune have weird magnetic fields — this might be why appeared first on Astronomy Magazine.

Before yesterdayفیزیک و مهندسی

'We didn't know what it was at first.' NASA aircraft uncovers site of secret Cold War nuclear missile tunnels under Greenland ice sheet

✇Space
By: brett.tingley@futurenet.com (Brett Tingley)
November 25th 2024 at 10:27 pm
NASA scientists conducting surveys of arctic ice sheets in Greenland got an unprecedented view of an abandoned "city under the ice" built by the U.S. military during the Cold War.

© NASA/US Army/Pictorial Parade/Archive Photos/Getty Images

  • ✇Astronomy Magazine
  • Chang’e 6 shakes up our knowledge of the Moon’s farsideRobert Reeves
    China’s lunar exploration program continues to rack up impressive scientific results. Their methodical progression of lunar orbiters, landers, and sample return missions display a consistent national effort to explore and understand the Moon in the 21st century. Unlike the early American and Russian lunar probes at the dawn of the Space Age that often endedContinue reading "Chang’e 6 shakes up our knowledge of the Moon’s farside" The post Chang’e 6 shakes up our knowledge of the Moon’s farside a
     
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Chang’e 6 shakes up our knowledge of the Moon’s farside

✇Astronomy Magazine
By: Robert Reeves
November 25th 2024 at 9:29 pm

China’s lunar exploration program continues to rack up impressive scientific results. Their methodical progression of lunar orbiters, landers, and sample return missions display a consistent national effort to explore and understand the Moon in the 21st century. Unlike the early American and Russian lunar probes at the dawn of the Space Age that often endedContinue reading "Chang’e 6 shakes up our knowledge of the Moon’s farside"

The post Chang’e 6 shakes up our knowledge of the Moon’s farside appeared first on Astronomy Magazine.

Strange 'zebra' patterns are coming from the Crab Nebula — this physicist finally figured out why

✇Space
By: conor.feehly94@gmail.com (Conor Feehly)
November 25th 2024 at 5:30 pm
There are strange "zebra" patterns coming from the Crab Nebula, and the reason has to do with plasma refraction.

© ESA/Herschel/PACS/MESS Key Programme Supernova Remnant Team; NASA, ESA and Allison Loll/Jeff Hester (Arizona State University)

  • ✇Astronomy Magazine
  • How long would it take for an observer using binoculars to notice the Moon’s terminator moving?Astronomy Staff
    With the Moon’s terminator moving almost 10 mph (16 km/h) across its equator, how long would it take for an observer using binoculars to notice a change in lunar features? Gary GarcharSan Jose, California The lunar terminator, the sunset/sunrise line that sweeps across the Moon’s surface as the Moon orbits Earth, travels at a rateContinue reading "How long would it take for an observer using binoculars to notice the Moon’s terminator moving?" The post How long would it take for an observer using
     
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How long would it take for an observer using binoculars to notice the Moon’s terminator moving?

✇Astronomy Magazine
By: Astronomy Staff
November 25th 2024 at 5:30 pm

With the Moon’s terminator moving almost 10 mph (16 km/h) across its equator, how long would it take for an observer using binoculars to notice a change in lunar features? Gary GarcharSan Jose, California The lunar terminator, the sunset/sunrise line that sweeps across the Moon’s surface as the Moon orbits Earth, travels at a rateContinue reading "How long would it take for an observer using binoculars to notice the Moon’s terminator moving?"

The post How long would it take for an observer using binoculars to notice the Moon’s terminator moving? appeared first on Astronomy Magazine.

  • ✇Space
  • Best Predator games of all time
    If it bleeds, we can kill it. But what about donning the mask and playing as the alien hunter instead? These are the best Predator video games.
     
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  • ✇Astronomy Magazine
  • Dark energy sheds light on life in the cosmosMark Zastrow
    In the 1960s, celebrated radio astronomer Frank Drake proposed his eponymous equation, which attempted to wrangle with the probability of finding extraterrestrial life — at least, the kind that we could identify through radio broadcasts — somewhere out there in the universe. One of the key parameters of that formulation is the rate of starContinue reading "Dark energy sheds light on life in the cosmos" The post Dark energy sheds light on life in the cosmos appeared first on Astronomy Magazine.
     
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Dark energy sheds light on life in the cosmos

✇Astronomy Magazine
By: Mark Zastrow
November 23rd 2024 at 2:30 pm

In the 1960s, celebrated radio astronomer Frank Drake proposed his eponymous equation, which attempted to wrangle with the probability of finding extraterrestrial life — at least, the kind that we could identify through radio broadcasts — somewhere out there in the universe. One of the key parameters of that formulation is the rate of starContinue reading "Dark energy sheds light on life in the cosmos"

The post Dark energy sheds light on life in the cosmos appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • The Lion’s markingsMark Zastrow
    David Gluchowski, taken from Brooklyn, New York The Lion Nebula (Sharpless 2–132) is a faint emission nebula lit by young hot stars; their winds and radiation are expanding outward, forming shock waves that comprise many of the lion’s features. This shot also accentuates the play of light and shadow around the lion’s “head”. The imagerContinue reading "The Lion’s markings" The post The Lion’s markings appeared first on Astronomy Magazine.
     
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The Lion’s markings

✇Astronomy Magazine
By: Mark Zastrow
November 22nd 2024 at 10:23 pm

David Gluchowski, taken from Brooklyn, New York The Lion Nebula (Sharpless 2–132) is a faint emission nebula lit by young hot stars; their winds and radiation are expanding outward, forming shock waves that comprise many of the lion’s features. This shot also accentuates the play of light and shadow around the lion’s “head”. The imagerContinue reading "The Lion’s markings"

The post The Lion’s markings appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • String theory is not dead yetTom Siegfried
    Scientists seeking the secrets of the universe would like to make a model that shows how all of nature’s forces and particles fit together. It would be nice to do it with Legos. But perhaps a better bet would be connecting everything with strings. Not literal strings, of course — but tiny loops or snippetsContinue reading "String theory is not dead yet" The post String theory is not dead yet appeared first on Astronomy Magazine.
     
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String theory is not dead yet

✇Astronomy Magazine
By: Tom Siegfried
November 22nd 2024 at 7:54 pm

Scientists seeking the secrets of the universe would like to make a model that shows how all of nature’s forces and particles fit together. It would be nice to do it with Legos. But perhaps a better bet would be connecting everything with strings. Not literal strings, of course — but tiny loops or snippetsContinue reading "String theory is not dead yet"

The post String theory is not dead yet appeared first on Astronomy Magazine.

Flight suit worn on 1st all-private astronaut mission to ISS debuts on display

✇Space
By: robert@collectspace.com (Robert Z. Pearlman)
November 22nd 2024 at 7:30 pm
When Michael Lopez-Alegria commanded the first privately funded crewed mission to visit the International Space Station, he traded his NASA "blues" for a "Deep Space" and "Mesosphere" flight suit.

© Kennedy Space Center Visitor Complex

Unusual black hole light bursts puzzle astronomers: 'We are finding a lot of weird stuff'

✇Space
November 22nd 2024 at 5:30 pm
Astronomers have stumbled upon a pair of massive black holes in a distant galaxy that are triggering unusual bursts of light that may be caused by the black hole duo disrupting a massive gas cloud — a phenomenon researchers say is the first of its kind to be detected.

© NASA/Aurore Simonnet (Sonoma State University

  • ✇Astronomy Magazine
  • JWST spots more light than expected in the early universeTheo Nicitopoulos
    The James Webb Space Telescope (JWST) is well-known for discovering young, bright galaxies in the very early universe. How such regions, bursting with stars, formed so quickly and survived is enticing researchers to rethink cosmic evolution.    A recent study published in Monthly Notices of the Royal Astronomical Society: Letters uses JWST data to probeContinue reading "JWST spots more light than expected in the early universe" The post JWST spots more light than expected in the early universe a
     
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JWST spots more light than expected in the early universe

✇Astronomy Magazine
By: Theo Nicitopoulos
November 22nd 2024 at 5:30 pm

The James Webb Space Telescope (JWST) is well-known for discovering young, bright galaxies in the very early universe. How such regions, bursting with stars, formed so quickly and survived is enticing researchers to rethink cosmic evolution.    A recent study published in Monthly Notices of the Royal Astronomical Society: Letters uses JWST data to probeContinue reading "JWST spots more light than expected in the early universe"

The post JWST spots more light than expected in the early universe appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • The Sky This Week from November 22 to 29: Venus lingers long after sunsetAlison Klesman
    Friday, November 22Last Quarter Moon occurs at 8:28 P.M. EST, leaving most of the evening dark for deep-sky observing.  About two hours after sunset, you’ll find the Great Square of Pegasus high in the southeastern sky. The Winged Horse is home to a fabulous globular cluster, M15, which just barely hits naked-eye magnitude at 6.2.Continue reading "The Sky This Week from November 22 to 29: Venus lingers long after sunset" The post The Sky This Week from November 22 to 29: Venus lingers long after
     
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The Sky This Week from November 22 to 29: Venus lingers long after sunset

✇Astronomy Magazine
By: Alison Klesman
November 22nd 2024 at 9:30 am

Friday, November 22Last Quarter Moon occurs at 8:28 P.M. EST, leaving most of the evening dark for deep-sky observing.  About two hours after sunset, you’ll find the Great Square of Pegasus high in the southeastern sky. The Winged Horse is home to a fabulous globular cluster, M15, which just barely hits naked-eye magnitude at 6.2.Continue reading "The Sky This Week from November 22 to 29: Venus lingers long after sunset"

The post The Sky This Week from November 22 to 29: Venus lingers long after sunset appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • Uranus may not have a weird magnetic field after allKorey Haynes
    In 1986, Voyager 2 flew by the ice giant Uranus. It was humanity’s first close-up view of the outer planet, and it remains the closest any spacecraft has ever come. On this trip, the spacecraft found 10 previously undiscovered moons, two rings, and a truly bizarre magnetic field that has baffled scientists ever since. MostContinue reading "Uranus may not have a weird magnetic field after all" The post Uranus may not have a weird magnetic field after all appeared first on Astronomy Magazine.
     
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Uranus may not have a weird magnetic field after all

✇Astronomy Magazine
By: Korey Haynes
November 22nd 2024 at 2:13 am

In 1986, Voyager 2 flew by the ice giant Uranus. It was humanity’s first close-up view of the outer planet, and it remains the closest any spacecraft has ever come. On this trip, the spacecraft found 10 previously undiscovered moons, two rings, and a truly bizarre magnetic field that has baffled scientists ever since. MostContinue reading "Uranus may not have a weird magnetic field after all"

The post Uranus may not have a weird magnetic field after all appeared first on Astronomy Magazine.

James Webb Space Telescope unveils surprising 'Red Monsters' in the early universe

✇Space
By: capellalarissa68@hotmail.com (Larissa G. Capella)
November 21st 2024 at 10:30 pm
Three ultramassive galaxies found by the James Webb Space Telescope have astronomers reconsidering how galaxies grew so quickly in the first billion years after the Big Bang.

© NASA/CSA/ESA, M. Xiao & P. A. Oesch (University of Geneva), G. Brammer (Niels Bohr Institute), Dawn JWST Archive

  • ✇Astronomy Magazine
  • How Comet ATLAS fizzled outDavid L. Chandler
    When comet C/2024 S1 (ATLAS) was first discovered in late September, it was almost immediately identified as a member of the Kreutz family of Sun-grazing comets. But it was highly unusual for a Kreutz comet — virtually all of these are only discovered in their last hours or days of existence, as they plunge towardContinue reading "How Comet ATLAS fizzled out" The post How Comet ATLAS fizzled out appeared first on Astronomy Magazine.
     
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How Comet ATLAS fizzled out

✇Astronomy Magazine
By: David L. Chandler
November 21st 2024 at 5:30 pm

When comet C/2024 S1 (ATLAS) was first discovered in late September, it was almost immediately identified as a member of the Kreutz family of Sun-grazing comets. But it was highly unusual for a Kreutz comet — virtually all of these are only discovered in their last hours or days of existence, as they plunge towardContinue reading "How Comet ATLAS fizzled out"

The post How Comet ATLAS fizzled out appeared first on Astronomy Magazine.

  • ✇اسطرلاب (StarYab)
  • خاموشی دور از انتظار؟فائزه اخلاقی‌منش
    با استفاده از مطالعه‌ی جمعیت ستاره‌ای۱ کهکشان‌ها می‌توان آن‌ها را به دو دسته‌ی کلی ستاره‌زا۲ و غیرستاره‌زا یا خاموش۳ طبقه‌بندی کرد. دسته‌ی اول شامل کهکشان‌هایی است که جوان و در حال ستاره‌زایی هستند و دسته‌ی دوم کهکشان‌هایی را شامل می‌شود که ستاره‌زایی در آن‌ها متوقف شده است و جمعیت ستاره‌ای پیرتری دارند. یکی از اهداف اصلی تلسکوپ فضایی جیمز وب۴، پاسخ به یکی از چالش‌برانگیزترین سوالات در مطالعه‌ی ساختار و تحول کهکشان‌ها است: چگونگی شکل‌گیری سریع جرم کهکشان‌ها در یک بازه‌ی زمانی بسیار کوتاه، پایان
     
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خاموشی دور از انتظار؟

✇اسطرلاب (StarYab)
By: فائزه اخلاقی‌منش
November 21st 2024 at 1:39 pm

با استفاده از مطالعه‌ی جمعیت ستاره‌ای۱ کهکشان‌ها می‌توان آن‌ها را به دو دسته‌ی کلی ستاره‌زا۲ و غیرستاره‌زا یا خاموش۳ طبقه‌بندی کرد. دسته‌ی اول شامل کهکشان‌هایی است که جوان و در حال ستاره‌زایی هستند و دسته‌ی دوم کهکشان‌هایی را شامل می‌شود که ستاره‌زایی در آن‌ها متوقف شده است و جمعیت ستاره‌ای پیرتری دارند. یکی از اهداف اصلی تلسکوپ فضایی جیمز وب۴، پاسخ به یکی از چالش‌برانگیزترین سوالات در مطالعه‌ی ساختار و تحول کهکشان‌ها است: چگونگی شکل‌گیری سریع جرم کهکشان‌ها در یک بازه‌ی زمانی بسیار کوتاه، پایان یافتن ستاره‌زایی آن‌ها و قرار گرفتن آن‌ها در دسته‌ی خاموش یا غیرستاره‌زا.

بر اساس تئوری‌های موجود در زمینه‌ی تحول کهکشان‌ها پیش‌بینی می‌شود که برای مصرف تمام گاز مورد نیاز برای ستاره‌زایی به زمانی از مرتبه‌ی میلیارد سال نیاز است (هر چند عواملی مانند بادهای‌ ستاره‌ای۵، بازخورد هسته‌ی فعال کهکشانی۶، ادغام‌۷ و برهم‌کنش با دیگر کهکشان‌ها می‌توانند این فرآیند را تسریع کنند). در نتیجه انتظار می‌رود با نگاه کردن به فواصل دورتر (نگاه به گذشته در زمان) شاهد تعداد کم‌تری از کهکشان‌های خاموش باشیم.

نویسندگان این مقاله با استفاده از داده‌های به دست آمده از طیف‌سنج فروسرخ نزدیک تلسکوپ فضایی جیمز وب (NIRSpec) حضور یک کهکشان خاموش به نام GS-9209 با جرم ستاره‌ای نزدیک به ۳۸ میلیون برابر جرم خورشید در انتقال به سرخ‌ ۴/۶۵۸، تنها ۱/۲۵ میلیارد سال بعد از انفجار بزرگ۸ را گزارش می‌کنند. بر اساس مطالعات انجام شده توسط این گروه به نظر می‌رسد تمام جرم ستاره‌ای این کهکشان تنها در یک بازه‌ی زمانی ۲۰۰ میلیون ساله، قبل از به پایان رسیدن فعالیت ستاره‌زایی در انتقال به سرخ ۶/۵ معادل با زمانی که عمر کیهان تنها ۸۰۰ میلیون سال بوده‌است، تشکیل شده باشد.

در این مقاله، نویسندگان خطوط جذبی طیف کهکشان GS-9209 را مطالعه کرده‌اند. بررسی خطوط جذبی طیف‌ کهکشان‌ها، یکی از روش‌های مطالعه‌ی تاریخچه‌ی خاموشی کهکشان‌های ستاره‌زا است. تصویر۱ طیف کهکشان GS-9209 را که توسط تلسکوپ فضایی جیمز وب رصد شده‌است، نشان می‌دهد. این طیف در بازه‌ی طول موجی۵/۱ -۱/۷میکرومتر قرار دارد که شامل تعداد زیادی خطوط جذبی بالمر۹ (خط جذبی حاصل از گذار الکترون از تراز۲ به ترازهای بالاتر) است. طیف به دست آمده از این کهکشان خاموش با حضور این خطوط جذبی بالمر شباهت بسیار زیادی به طیف ستارگان نوع A داشته که با استفاده از آن‌ها می‌توان تحولات ستاره‌زایی را در طول زمانی از مرتبه‌ی حدود ۱۰۰ میلیون سال بررسی کرد. به بیان ساده‌تر، این ستارگان اطلاعات مربوط به تغییرات ستاره‌زایی در طی ۱۰۰ میلیون سال اخیر را در بر دارند. حضور این جمعیت ستاره‌ای یادآور کهکشان‌های پساستاره‌زا۱۰ در انتقال به سرخ‌های پایین‌تر و نشان‌دهنده‌ی پایان ستاره‌زایی در یک بازه‌ی کوتاه، در حدود طول عمر ستارگان نوع A بر روی رشته‌ی اصلی است. نویسندگان این مقاله برای تعیین عمق هر کدام از این خطوط جذبی پهنای-هم‌عرض۱۱ این خطوط را گزارش می‌کنند (پهنای-هم‌عرض معیاری است که شدت یک خط جذبی را توصیف می‌کند). مطالعه‌ی پهنای-هم‌عرض خطوط مشاهده شده‌ی جذبی سری بالمر و پهن‌شدگی نسبی خط نشری نیتروژن-۲ نسبت به خط نشری پهن شده‌‌ی هیدروژن-آلفا (حاصل از گذار الکترون برانگیخته از تراز ۳ به ۲) به ترتیب نمایان‌گر غالب بودن جمعیت‌ ستاره‌ای در پیوستار و حضور هسته‌ی فعال کهکشانی است.

شکل ۱. طیف گرفته‌شده از GS-9209 با استفاده از طیف‌سنج تلسکوپ فضایی جیمز وب در ناحیه‌ی فروسرخ نزدیک. خط سیاه مدل‌ به دست آمده از کد Bagpipes برای برازش بر روی خطوط جذبی و نشری موجود در طیف را نمایش می‌دهد. این کد با بهره‌گیری از آمار بیز و همچنین در برداشتن فرضیات گسترده در مورد تاریخچه‌ی ستاره‌زایی برای مدل سازی طیف کهکشان‌ها استفاده می‌شود.

شکل ۱. طیف گرفته‌شده از GS-9209 با استفاده از طیف‌سنج تلسکوپ فضایی جیمز وب در ناحیه‌ی فروسرخ نزدیک. خط سیاه مدل‌ به دست آمده از کد Bagpipes برای برازش بر روی خطوط جذبی و نشری موجود در طیف را نمایش می‌دهد. این کد با بهره‌گیری از آمار بیز و همچنین در برداشتن فرضیات گسترده در مورد تاریخچه‌ی ستاره‌زایی برای مدل سازی طیف کهکشان‌ها استفاده می‌شود.

شکل ۲. نرخ ستاره‌زایی کهکشان GS-9209 بر اساس تابعی از زمان. طبق این نمودار، کهکشان GS-9209، عمده‌ی جمعیت ستاره‌ای خود را طی یک بازه‌ی زمانی ۲۰۰ میلیون ساله، از حدود ۶۰۰ تا ۸۰۰ میلیون سال پس از انفجار بزرگ شکل داده‌است.

شکل ۲. نرخ ستاره‌زایی کهکشان GS-9209 بر اساس تابعی از زمان. طبق این نمودار، کهکشان GS-9209، عمده‌ی جمعیت ستاره‌ای خود را طی یک بازه‌ی زمانی ۲۰۰ میلیون ساله، از حدود ۶۰۰ تا ۸۰۰ میلیون سال پس از انفجار بزرگ شکل داده‌است.

مطالعات خط نشری پهن شده‌ی هیدروژن-آلفا و نیتروژن-۲ بر روی طیف کهکشان GS-9209 نشان می‌دهد که این کهکشان دربردارنده‌ی یک ابرسیاه‌چاله‌۱۲ با جرمی ۴-۵ برابر جرم قابل انتظار برای کهکشان‌هایی با جرم ستاره‌ای مشابه GS-9209 است. بر اساس نتایج به دست آمده از بررسی تاریخچه‌ی ستاره‌زایی در این کهکشان، میانگین نرخ ستاره‌زایی این کهکشان در ۱۰۰ میلیون سال گذشته تقریبا برابر با صفر است و این کهکشان را در دسته‌بندی غیرستاره‌زا قرار می‌دهد. بررسی بیش‌تر بر روی پیشینه‌ی فعالیت این ابرسیاه‌چاله‌، بازخورد فعالیت‌های ناشی از هسته‌ی فعال کهکشانی را یکی از دلایل احتمالی برای توقف ستاره‌زایی در این کهکشان می‌داند. هسته‌ی فعال کهکشانی باعث گرمایش گاز سرد (سوخت اصلی ستاره‌زایی) شده و کهکشان‌ها را از حالت فعال ستاره‌زایی به حالت غیرفعال تبدیل می‌کند. GS-9209 یک نمونه‌ی جالب توجه است که نشان می‌دهد تشکیل ساختارهای عظیمی مانند کهکشان‌ها، در همان یک میلیارد سال اولیه‌ی عالم و خاموشی ستاره‌زایی حداکثر تا ۸۰۰ میلیون سال بعد از انفجار بزرگ به خوبی صورت گرفته‌است.

 

۱. Stellar Population
۲. Star Forming
۳. Quiescent
۴. James Webb Space Telescope (JWST)
۵. Stellar Winds
۶.Active Galactic Nucleus (AGN) Feedback
۷. Merger
۸. Big Bang
۹. Balmer Absorption Lines
۱۰. Post-Starburst Galaxies
۱۱. Equivalent Width
۱۲. Super Massive Blackhole

شکل بالای صفحه: گروه کهکشانی HCG 87. در این تصویر کهکشان‌های ستاره‌زا و غیرستاره‌زا دیده می‌شوند. منبع: ویکیپدیا

عنوان اصلی مقاله: A massive quiescent galaxy at redshift 4.658
نویسندگان: Adam C. Carnall et al
لینک اصلی مقاله: https://arxiv.org/pdf/2301.11413

گردآوری: فائزه اخلاقی‌منش

 

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  • What is dark energy?David J. Eicher
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What is dark energy?

✇Astronomy Magazine
By: David J. Eicher
November 12th 2024 at 8:07 pm

In a 1998 research breakthrough, Saul Perlmutter of the University of California, Berkeley, and his colleagues in the Supernova Cosmology Project found the expansion rate of the universe is accelerating. Perlmutter and his team made the discovery by observing distant type Ia supernovae, whose brightnesses are well known, at different distances. His team made observationsContinue reading "What is dark energy?"

The post What is dark energy? appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • ESO captures Dark Wolf Nebula stalking across the Milky Way Korey Haynes
    Inside the bright but unassumingly named nebula Gum 55 lies a dark nebula — a rift of dust grains that absorb visible light — creating a swatch of darkness against the glow of bright gas. Fittingly named for its shape, the Dark Wolf Nebula is no mere puppy — it spans an area some fourContinue reading "ESO captures Dark Wolf Nebula stalking across the Milky Way " The post ESO captures Dark Wolf Nebula stalking across the Milky Way  appeared first on Astronomy Magazine.
     
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ESO captures Dark Wolf Nebula stalking across the Milky Way 

✇Astronomy Magazine
By: Korey Haynes
November 12th 2024 at 7:45 pm

Inside the bright but unassumingly named nebula Gum 55 lies a dark nebula — a rift of dust grains that absorb visible light — creating a swatch of darkness against the glow of bright gas. Fittingly named for its shape, the Dark Wolf Nebula is no mere puppy — it spans an area some fourContinue reading "ESO captures Dark Wolf Nebula stalking across the Milky Way "

The post ESO captures Dark Wolf Nebula stalking across the Milky Way  appeared first on Astronomy Magazine.

Quantifying the Background Radiation Hitting Superconducting Qubits

✇American Physical Society
By: Marric Stephens
November 12th 2024 at 1:30 pm

Author(s): Marric Stephens

Researchers have characterized the naturally occurring background radiation hitting a typical quantum circuit—a result that might help with the engineering of devices that are less vulnerable to radiation-induced decoherence.


[Physics 17, s140] Published Tue Nov 12, 2024

Mysterious, city-size 'centaur' comet gets 300 times brighter after quadruple cold-volcanic eruption

✇Space
November 12th 2024 at 5:30 pm
The cryovolcanic "centaur" comet 29P/Schwassmann-Wachmann has erupted four times in less than 48 hours, becoming unusually bright in the process. It is the most powerful outburst from the city-size oddball in more than three years.

© NASA/Spitzer Space Telescope 

  • ✇Astronomy Magazine
  • New astronomy products to be thankful forAstronomy Staff
    Star struck Wisconsin Historical Society PressMadison, WI In Chasing the Stars, authors Kelly Tyrell and James Lattis discuss the astronomical achievements of Washburn Observatory at the University of Wisconsin. The book’s 256 pages feature many images and details the early days of stargazing in the region, as well as Washburn’s many modern discoveries in theContinue reading "New astronomy products to be thankful for" The post New astronomy products to be thankful for appeared first on Astronomy
     
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New astronomy products to be thankful for

✇Astronomy Magazine
By: Astronomy Staff
November 12th 2024 at 5:30 pm

Star struck Wisconsin Historical Society PressMadison, WI In Chasing the Stars, authors Kelly Tyrell and James Lattis discuss the astronomical achievements of Washburn Observatory at the University of Wisconsin. The book’s 256 pages feature many images and details the early days of stargazing in the region, as well as Washburn’s many modern discoveries in theContinue reading "New astronomy products to be thankful for"

The post New astronomy products to be thankful for appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • Dust on dustMark Zastrow
    Lynn Hilborn from Grafton, Ontario The origin of the reflection nebula van den Bergh 9 in Cassiopeia is the Cepheid variable star SU Cas; its blue light is reflected by surrounding dust, which are themselves partially shrouded by thicker dust clouds. This image represents 5 hours of exposure on an 8-inch scope in RGB filters. The post Dust on dust appeared first on Astronomy Magazine.
     
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Dust on dust

✇Astronomy Magazine
By: Mark Zastrow
November 11th 2024 at 11:40 pm

Lynn Hilborn from Grafton, Ontario The origin of the reflection nebula van den Bergh 9 in Cassiopeia is the Cepheid variable star SU Cas; its blue light is reflected by surrounding dust, which are themselves partially shrouded by thicker dust clouds. This image represents 5 hours of exposure on an 8-inch scope in RGB filters.

The post Dust on dust appeared first on Astronomy Magazine.

At 60 years, monument to NASA's Project Mercury still stands, but what of its time capsule?

✇Space
By: robert@collectspace.com (Robert Z. Pearlman)
November 11th 2024 at 8:30 pm
A 60-year-old tribute to America's first human spaceflight program is standing up to the test of time, but what about the contents of its time capsule not to be opened until 2464?

© Cape Canaveral Space Force Museum

  • ✇Astronomy Magazine
  • The Leonid meteor shower: This Week in Astronomy with Dave EicherDavid J. Eicher
    In this episode, Dave Eicher invites you to observe the what happens when our planet, during its journey around the Sun, runs into a stream of particles in its orbit. Such an event is called a meteor shower, and because the streaks of light from these meteors seem to all come from a point in theContinue reading "The Leonid meteor shower: This Week in Astronomy with Dave Eicher" The post The Leonid meteor shower: This Week in Astronomy with Dave Eicher appeared first on Astronomy Magazine.
     
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The Leonid meteor shower: This Week in Astronomy with Dave Eicher

✇Astronomy Magazine
By: David J. Eicher
November 11th 2024 at 7:52 pm

In this episode, Dave Eicher invites you to observe the what happens when our planet, during its journey around the Sun, runs into a stream of particles in its orbit. Such an event is called a meteor shower, and because the streaks of light from these meteors seem to all come from a point in theContinue reading "The Leonid meteor shower: This Week in Astronomy with Dave Eicher"

The post The Leonid meteor shower: This Week in Astronomy with Dave Eicher appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • What is the universe expanding into?Astronomy Staff
    What is the universe expanding into? Euan TobinEdinburgh, Scotland This excellent question forces us to confront a region beyond the bounds of our intuition, so please bear with me. When you inflate a balloon, the balloon’s membrane moves outward, closer to the boundaries of whatever room encloses it. You can easily visualize this expansion becauseContinue reading "What is the universe expanding into?" The post What is the universe expanding into? appeared first on Astronomy Magazine.
     
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What is the universe expanding into?

✇Astronomy Magazine
By: Astronomy Staff
November 11th 2024 at 7:30 pm

What is the universe expanding into? Euan TobinEdinburgh, Scotland This excellent question forces us to confront a region beyond the bounds of our intuition, so please bear with me. When you inflate a balloon, the balloon’s membrane moves outward, closer to the boundaries of whatever room encloses it. You can easily visualize this expansion becauseContinue reading "What is the universe expanding into?"

The post What is the universe expanding into? appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • How carbon dioxide glaciers gave Mars liquid waterKorey Haynes
    Mars is tantalizingly similar to Earth in many ways, but especially in its surface features, which often resemble Earth deserts to an eerie degree. Both Earth and Mars share features such as valleys; canyons; fanlike washes of sand and rock; and long, winding gravel ridges called eskers. All are formed by flowing water, marking theContinue reading "How carbon dioxide glaciers gave Mars liquid water" The post How carbon dioxide glaciers gave Mars liquid water appeared first on Astronomy Magazine.
     
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How carbon dioxide glaciers gave Mars liquid water

✇Astronomy Magazine
By: Korey Haynes
November 8th 2024 at 9:38 pm

Mars is tantalizingly similar to Earth in many ways, but especially in its surface features, which often resemble Earth deserts to an eerie degree. Both Earth and Mars share features such as valleys; canyons; fanlike washes of sand and rock; and long, winding gravel ridges called eskers. All are formed by flowing water, marking theContinue reading "How carbon dioxide glaciers gave Mars liquid water"

The post How carbon dioxide glaciers gave Mars liquid water appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • How to see a Saturn ring mirageStephen James O'Meara
    Roughly every 15 years, Earth passes through the plane of Saturn’s rings, causing them to nearly disappear from view — not to mention generating a variety of other interesting phenomena. The next such edge-on appearance will be in March 2025, though Saturn will unfortunately be too close to the Sun (only 9.5° away) for usContinue reading "How to see a Saturn ring mirage" The post How to see a Saturn ring mirage appeared first on Astronomy Magazine.
     
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How to see a Saturn ring mirage

✇Astronomy Magazine
By: Stephen James O'Meara
November 8th 2024 at 5:30 pm

Roughly every 15 years, Earth passes through the plane of Saturn’s rings, causing them to nearly disappear from view — not to mention generating a variety of other interesting phenomena. The next such edge-on appearance will be in March 2025, though Saturn will unfortunately be too close to the Sun (only 9.5° away) for usContinue reading "How to see a Saturn ring mirage"

The post How to see a Saturn ring mirage appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • SpaceX: Starship Flight 6 coming later this monthMark Zastrow
    The sixth test flight of Starship — the largest and most powerful rocket to ever fly — will launch no earlier than 5 p.m. EST on Monday, November 18, SpaceX said Wednesday. The previous test flight of Starship, which SpaceX also refers to simply as “Ship,” and the Super Heavy booster resulted in the unprecedented catchContinue reading "SpaceX: Starship Flight 6 coming later this month" The post SpaceX: Starship Flight 6 coming later this month appeared first on Astronomy Magazine.
     
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SpaceX: Starship Flight 6 coming later this month

✇Astronomy Magazine
By: Mark Zastrow
November 8th 2024 at 2:30 pm

The sixth test flight of Starship — the largest and most powerful rocket to ever fly — will launch no earlier than 5 p.m. EST on Monday, November 18, SpaceX said Wednesday. The previous test flight of Starship, which SpaceX also refers to simply as “Ship,” and the Super Heavy booster resulted in the unprecedented catchContinue reading "SpaceX: Starship Flight 6 coming later this month"

The post SpaceX: Starship Flight 6 coming later this month appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • The Sky This Week from November 8 to 15: Catch the Leonids earlyAlison Klesman
    Friday, November 8Although the constellation Perseus is perhaps best known for housing the famous Double Cluster, it’s also home to another open star cluster: M34, one of the Hero’s two Messier objects.  M34 is some 180 million years old and sits 1,400 light-years from Earth. The cluster contains about 100 stars and takes up roughlyContinue reading "The Sky This Week from November 8 to 15: Catch the Leonids early" The post The Sky This Week from November 8 to 15: Catch the Leonids early appeared
     
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The Sky This Week from November 8 to 15: Catch the Leonids early

✇Astronomy Magazine
By: Alison Klesman
November 8th 2024 at 9:30 am

Friday, November 8Although the constellation Perseus is perhaps best known for housing the famous Double Cluster, it’s also home to another open star cluster: M34, one of the Hero’s two Messier objects.  M34 is some 180 million years old and sits 1,400 light-years from Earth. The cluster contains about 100 stars and takes up roughlyContinue reading "The Sky This Week from November 8 to 15: Catch the Leonids early"

The post The Sky This Week from November 8 to 15: Catch the Leonids early appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • Five ‘shy,’ lesser-known deep-sky gems to observeStuart Atkinson
    Many constellations are well-known for having one very special deep-sky object within their borders, something so famous that when you read or hear that constellation’s name, you instantly think of it, like an astronomical word association game. Orion? The Orion Nebula! Andromeda? The Andromeda Galaxy, of course! Lyra? Easy — the Ring Nebula. And Perseus?Continue reading "Five ‘shy,’ lesser-known deep-sky gems to observe" The post Five ‘shy,’ lesser-known deep-sky gems to observe appeared first
     
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Five ‘shy,’ lesser-known deep-sky gems to observe

✇Astronomy Magazine
By: Stuart Atkinson
November 7th 2024 at 5:30 pm

Many constellations are well-known for having one very special deep-sky object within their borders, something so famous that when you read or hear that constellation’s name, you instantly think of it, like an astronomical word association game. Orion? The Orion Nebula! Andromeda? The Andromeda Galaxy, of course! Lyra? Easy — the Ring Nebula. And Perseus?Continue reading "Five ‘shy,’ lesser-known deep-sky gems to observe"

The post Five ‘shy,’ lesser-known deep-sky gems to observe appeared first on Astronomy Magazine.

'What's Starlink?' Trump talks Elon Musk, Starship and SpaceX in election night victory speech (video)

✇Space
By: brett.tingley@futurenet.com (Brett Tingley)
November 7th 2024 at 12:03 am
President-elect Donald Trump had high words of praise for Elon Musk and SpaceX during his election night victory speech, mentioning twice that he did not know what Starlink satellites were.

© Justin Merriman/Bloomberg via Getty Images

  • ✇Astronomy Magazine
  • Learn the difference between common astronomical termsStuart Atkinson
    Astronomy is a science and a hobby that loves long words, acronyms, and abbreviations. At times, listening to someone talking about an event happening in the sky or an object faraway in space can feel like watching one of those episodes of Star Trek where the characters spend 10 minutes just speaking in “technobabble,” soContinue reading "Learn the difference between common astronomical terms" The post Learn the difference between common astronomical terms appeared first on Astronomy Magazine.
     
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Learn the difference between common astronomical terms

✇Astronomy Magazine
By: Stuart Atkinson
November 6th 2024 at 9:30 pm

Astronomy is a science and a hobby that loves long words, acronyms, and abbreviations. At times, listening to someone talking about an event happening in the sky or an object faraway in space can feel like watching one of those episodes of Star Trek where the characters spend 10 minutes just speaking in “technobabble,” soContinue reading "Learn the difference between common astronomical terms"

The post Learn the difference between common astronomical terms appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • A meteoric volleyMark Zastrow
    Xiaofeng Qu, taken at Xiaochaidan Lake, Qinghai Province, China The Perseid meteors streak across the sky from its radiant in the constellation Perseus appearing in this perspective to be lobbed across the sky. This panorama of 17 stitched 60-second frames was taken with a Nikon DSLR at 14mm lens at f/1.8. Sky frames were capturedContinue reading "A meteoric volley" The post A meteoric volley appeared first on Astronomy Magazine.
     
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A meteoric volley

✇Astronomy Magazine
By: Mark Zastrow
November 6th 2024 at 8:37 pm

Xiaofeng Qu, taken at Xiaochaidan Lake, Qinghai Province, China The Perseid meteors streak across the sky from its radiant in the constellation Perseus appearing in this perspective to be lobbed across the sky. This panorama of 17 stitched 60-second frames was taken with a Nikon DSLR at 14mm lens at f/1.8. Sky frames were capturedContinue reading "A meteoric volley"

The post A meteoric volley appeared first on Astronomy Magazine.

Recruiting the world’s first disabled astronaut doesn't mean space travel is inclusive – here’s how to change that

✇Space
November 6th 2024 at 7:30 pm
Despite the rapid growth in the number of space travellers, underrepresented population groups are still left behind, particularly those with disabilities. So how can space agencies and “space tourism” companies make spaceflight more inclusive for disabled astronauts?

© ESA/Novespace

  • ✇Astronomy Magazine
  • We’re entering the era of private space stationsDoug Adler
    The era of the International Space Station (ISS) is coming to a close. In the near future, NASA plans to bring down the station in a controlled deorbit. The end of the ISS will leave a large gap in human spaceflight, although the Chinese Tiangong space station is currently active. Still, to make a spaceContinue reading "We’re entering the era of private space stations" The post We’re entering the era of private space stations appeared first on Astronomy Magazine.
     
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We’re entering the era of private space stations

✇Astronomy Magazine
By: Doug Adler
November 6th 2024 at 6:30 pm

The era of the International Space Station (ISS) is coming to a close. In the near future, NASA plans to bring down the station in a controlled deorbit. The end of the ISS will leave a large gap in human spaceflight, although the Chinese Tiangong space station is currently active. Still, to make a spaceContinue reading "We’re entering the era of private space stations"

The post We’re entering the era of private space stations appeared first on Astronomy Magazine.

Supernova hides in new Hubble Telescope galaxy 'light show' image (photo)

✇Space
November 6th 2024 at 2:30 pm
A celestial light show illuminates a distant spiral galaxy, where a hidden supernova briefly outshines its stellar neighbors in a new image from the Hubble Space Telescope.

© ESA/Hubble & NASA, O. Fox, L. Jenkins, S. Van Dyk, A. Filippenko, J. Lee and the PHANGS-HST Team, D. de Martin (ESA/Hubble), M. Zamani (ESA/Hubble)

  • ✇Astronomy Magazine
  • Starmus La Palma: The Island of Stars lineup revealed Alison Klesman
    Today, at the World Travel Market in London, STARMUS and The Canary Islands proudly unveiled the line-up for the highly anticipated STARMUS La Palma festival. The announcement was made during a special presentation led by STARMUS co-founder and Director, Prof. Garik Israelian, featuring the President of the Cabildo de La Palma, Sergio Rodríguez. Under theContinue reading "Starmus La Palma: The Island of Stars lineup revealed " The post Starmus La Palma: The Island of Stars lineup revealed  appea
     
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Starmus La Palma: The Island of Stars lineup revealed 

✇Astronomy Magazine
By: Alison Klesman
November 6th 2024 at 12:42 am

Today, at the World Travel Market in London, STARMUS and The Canary Islands proudly unveiled the line-up for the highly anticipated STARMUS La Palma festival. The announcement was made during a special presentation led by STARMUS co-founder and Director, Prof. Garik Israelian, featuring the President of the Cabildo de La Palma, Sergio Rodríguez. Under theContinue reading "Starmus La Palma: The Island of Stars lineup revealed "

The post Starmus La Palma: The Island of Stars lineup revealed  appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • Could a methane crust be keeping Titan warm?Alison Klesman
    The second-largest moon in our solar system may have a secret ingredient that explains many of its mysteries — and maybe ups the chances for life there. In research published Sept. 30 in The Planetary Science Journal, a University of Hawaii-led team modeled the potential for methane clathrate (a kind of methane-infused water ice) inContinue reading "Could a methane crust be keeping Titan warm?" The post Could a methane crust be keeping Titan warm? appeared first on Astronomy Magazine.
     
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Could a methane crust be keeping Titan warm?

✇Astronomy Magazine
By: Alison Klesman
November 5th 2024 at 10:30 pm

The second-largest moon in our solar system may have a secret ingredient that explains many of its mysteries — and maybe ups the chances for life there. In research published Sept. 30 in The Planetary Science Journal, a University of Hawaii-led team modeled the potential for methane clathrate (a kind of methane-infused water ice) inContinue reading "Could a methane crust be keeping Titan warm?"

The post Could a methane crust be keeping Titan warm? appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • This famous black hole system is actually a tripleDaniela Mata
    Despite their destructive forces, black holes are often seen in with a companion, such as a star, neutron star, white dwarf, or even another black hole. However, a study published Oct. 23 in Nature has found that the black hole binary system V404 Cygni, which contains a black hole and a small star, has anContinue reading "This famous black hole system is actually a triple" The post This famous black hole system is actually a triple appeared first on Astronomy Magazine.
     
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This famous black hole system is actually a triple

✇Astronomy Magazine
By: Daniela Mata
November 5th 2024 at 7:30 pm

Despite their destructive forces, black holes are often seen in with a companion, such as a star, neutron star, white dwarf, or even another black hole. However, a study published Oct. 23 in Nature has found that the black hole binary system V404 Cygni, which contains a black hole and a small star, has anContinue reading "This famous black hole system is actually a triple"

The post This famous black hole system is actually a triple appeared first on Astronomy Magazine.

'Vega continues to be unusual:' Lack of planets around young star puzzles astronomers

✇Space
November 5th 2024 at 5:30 pm
A joint Hubble and James Webb Space Telescope (JWST) project to learn more about the dusty disk around the bright star Vega has found a surprising lack of planets.

© NASA, ESA, CSA, STScI, S. Wolff (University of Arizona), K. Su (University of Arizona), A. Gáspár (University of Arizona)

  • ✇Astronomy Magazine
  • Explore the science of rainbowsRaymond Shubinski
    Rainbows don’t actually exist. You can’t find the end of a rainbow (or its attendant pot of gold). It’s not possible to walk across a rainbow as the Norse gods did on the Bifrost, the bridge for fallen warriors to reach Valhalla, or to travel over one like Dorothy to Oz. Rather, rainbows and otherContinue reading "Explore the science of rainbows" The post Explore the science of rainbows appeared first on Astronomy Magazine.
     
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Explore the science of rainbows

✇Astronomy Magazine
By: Raymond Shubinski
November 5th 2024 at 5:30 pm

Rainbows don’t actually exist. You can’t find the end of a rainbow (or its attendant pot of gold). It’s not possible to walk across a rainbow as the Norse gods did on the Bifrost, the bridge for fallen warriors to reach Valhalla, or to travel over one like Dorothy to Oz. Rather, rainbows and otherContinue reading "Explore the science of rainbows"

The post Explore the science of rainbows appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • Universe, Discovered: Comet Tsuchinshan-ATLAS still a naked eye object — barelyDavid J. Eicher
    Stellar Stories Comet Tsuchinshan-ATLAS now a faint naked-eye object Moving across the constellation Ophiuchus in the evening sky, Comet C/2023 A3 Tsuchinshan-ATLAS continues to fade as it moves farther away from Earth and the Sun. The comet now glows at 6th magnitude, keeping it as a faint naked-eye object under a very dark sky. ButContinue reading "Universe, Discovered: Comet Tsuchinshan-ATLAS still a naked eye object — barely" The post Universe, Discovered: Comet Tsuchinshan-ATLAS still a nak
     
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Universe, Discovered: Comet Tsuchinshan-ATLAS still a naked eye object — barely

✇Astronomy Magazine
By: David J. Eicher
November 5th 2024 at 2:30 pm

Stellar Stories Comet Tsuchinshan-ATLAS now a faint naked-eye object Moving across the constellation Ophiuchus in the evening sky, Comet C/2023 A3 Tsuchinshan-ATLAS continues to fade as it moves farther away from Earth and the Sun. The comet now glows at 6th magnitude, keeping it as a faint naked-eye object under a very dark sky. ButContinue reading "Universe, Discovered: Comet Tsuchinshan-ATLAS still a naked eye object — barely"

The post Universe, Discovered: Comet Tsuchinshan-ATLAS still a naked eye object — barely appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • Universe, Discovered: Hera launches to asteroid crash sceneDavid J. Eicher
    Stellar Stories Hera spacecraft launched The European Space Agency’s Hxera spacecraft launched on October 7, initiating an exciting exploration of an unusual asteroid. The solar system contains many thousands of small asteroid bodies, but the target here — 65803 Didymos, is a binary object spanning some 850 meters (about half a mile). The accompanying imageContinue reading "Universe, Discovered: Hera launches to asteroid crash scene" The post Universe, Discovered: Hera launches to asteroid crash
     
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Universe, Discovered: Hera launches to asteroid crash scene

✇Astronomy Magazine
By: David J. Eicher
November 5th 2024 at 11:46 am

Stellar Stories Hera spacecraft launched The European Space Agency’s Hxera spacecraft launched on October 7, initiating an exciting exploration of an unusual asteroid. The solar system contains many thousands of small asteroid bodies, but the target here — 65803 Didymos, is a binary object spanning some 850 meters (about half a mile). The accompanying imageContinue reading "Universe, Discovered: Hera launches to asteroid crash scene"

The post Universe, Discovered: Hera launches to asteroid crash scene appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • The Moon meets Saturn: This Week in Astronomy with Dave EicherDavid J. Eicher
    In this episode, Dave Eicher invites you to observe the Moon as it closely passes the Ringed Planet on the evening of November 10. Our natural satellite will be just past its First Quarter phase, while Saturn will glow nicely at magnitude 0.8. If you have a telescope and point it at Saturn, you’ll seeContinue reading "The Moon meets Saturn: This Week in Astronomy with Dave Eicher" The post The Moon meets Saturn: This Week in Astronomy with Dave Eicher appeared first on Astronomy Magazine.
     
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The Moon meets Saturn: This Week in Astronomy with Dave Eicher

✇Astronomy Magazine
By: David J. Eicher
November 5th 2024 at 2:42 am

In this episode, Dave Eicher invites you to observe the Moon as it closely passes the Ringed Planet on the evening of November 10. Our natural satellite will be just past its First Quarter phase, while Saturn will glow nicely at magnitude 0.8. If you have a telescope and point it at Saturn, you’ll seeContinue reading "The Moon meets Saturn: This Week in Astronomy with Dave Eicher"

The post The Moon meets Saturn: This Week in Astronomy with Dave Eicher appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • Here are the nine sites where Artemis 3 might land on the MoonRobert Reeves
    It has been 52 years since Apollo 17 lifted off from the Taurus-Littrow Valley on the Moon.  All the Apollo landing sites, starting with Tranquility Base on the Moon’s Sea of Tranquility, have been immortalized in print and film and are well known to space aficionados worldwide. But soon, another name will join the exclusiveContinue reading "Here are the nine sites where Artemis 3 might land on the Moon" The post Here are the nine sites where Artemis 3 might land on the Moon appeared first on As
     
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Here are the nine sites where Artemis 3 might land on the Moon

✇Astronomy Magazine
By: Robert Reeves
November 4th 2024 at 8:56 pm

It has been 52 years since Apollo 17 lifted off from the Taurus-Littrow Valley on the Moon.  All the Apollo landing sites, starting with Tranquility Base on the Moon’s Sea of Tranquility, have been immortalized in print and film and are well known to space aficionados worldwide. But soon, another name will join the exclusiveContinue reading "Here are the nine sites where Artemis 3 might land on the Moon"

The post Here are the nine sites where Artemis 3 might land on the Moon appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • How are long-exposure astrophotos made? Astronomy Staff
    Many astrophotos feature exposures of 12 hours or more. Since nighttime darkness is only about this long, this implies multiple exposures on different nights. How does one set things up to get the exact same location, and avoid parallax error due to Earth’s rotation and orbit? Jose G. RieraSt. Augustine, Florida You are correct, manyContinue reading "How are long-exposure astrophotos made? " The post How are long-exposure astrophotos made?  appeared first on Astronomy Magazine.
     
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How are long-exposure astrophotos made? 

✇Astronomy Magazine
By: Astronomy Staff
November 4th 2024 at 7:30 pm

Many astrophotos feature exposures of 12 hours or more. Since nighttime darkness is only about this long, this implies multiple exposures on different nights. How does one set things up to get the exact same location, and avoid parallax error due to Earth’s rotation and orbit? Jose G. RieraSt. Augustine, Florida You are correct, manyContinue reading "How are long-exposure astrophotos made? "

The post How are long-exposure astrophotos made?  appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • Eye of the universeMark Zastrow
    Overall Photons: Andrea Iorio, Elisa Cuccu, Fernando Linsalata, Javier Caldera, Paul Montague, Carlos Uriarte Castillo, Darius Kopriva, Drew Evans, Bruno Rota Sargi, Blake Behrends, Manuel Alejandro Chavarría Silva, Phillip Hoppes, Jan Beranek, Roberto Volpini, Pier Mattia Basciano, Marco Finatti, Jeff Ratino, Vakhtang Khutsishvili, and Patrice Soom NGC 7293 — better known as the Helix NebulaContinue reading "Eye of the universe" The post Eye of the universe appeared first on Astronomy Magazine.
     
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Eye of the universe

✇Astronomy Magazine
By: Mark Zastrow
November 4th 2024 at 2:30 pm

Overall Photons: Andrea Iorio, Elisa Cuccu, Fernando Linsalata, Javier Caldera, Paul Montague, Carlos Uriarte Castillo, Darius Kopriva, Drew Evans, Bruno Rota Sargi, Blake Behrends, Manuel Alejandro Chavarría Silva, Phillip Hoppes, Jan Beranek, Roberto Volpini, Pier Mattia Basciano, Marco Finatti, Jeff Ratino, Vakhtang Khutsishvili, and Patrice Soom NGC 7293 — better known as the Helix NebulaContinue reading "Eye of the universe"

The post Eye of the universe appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • How Edwin Hubble won the Great DebateAlison Klesman
    By the dawn of the 20th century, not much had changed in the 400 years since Galileo’s discovery of the four jovian moons and his confirmation of Copernicus’ Sun-centered solar system.  Through the early 1900s, astronomers disagreed on whether the universe was home to a multitude of galaxies, so-called “island universes,” or contained entirely withinContinue reading "How Edwin Hubble won the Great Debate" The post How Edwin Hubble won the Great Debate appeared first on Astronomy Magazine.
     
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How Edwin Hubble won the Great Debate

✇Astronomy Magazine
By: Alison Klesman
November 2nd 2024 at 8:30 pm

By the dawn of the 20th century, not much had changed in the 400 years since Galileo’s discovery of the four jovian moons and his confirmation of Copernicus’ Sun-centered solar system.  Through the early 1900s, astronomers disagreed on whether the universe was home to a multitude of galaxies, so-called “island universes,” or contained entirely withinContinue reading "How Edwin Hubble won the Great Debate"

The post How Edwin Hubble won the Great Debate appeared first on Astronomy Magazine.

  • ✇Astronomy Magazine
  • Chandra X-ray telescope, facing chopping block, gets reprieve from NASARandall Hyman
    Scientists breathed a collective sigh of relief last week when NASA announced that the Chandra X-ray Observatory had been spared the chopping block — at least for another year. It was an abrupt about-face from plans announced in March to decommission the space-based telescope by this December.  Much of the credit for the 11th-hour stayContinue reading "Chandra X-ray telescope, facing chopping block, gets reprieve from NASA" The post Chandra X-ray telescope, facing chopping block, gets reprieve f
     
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Chandra X-ray telescope, facing chopping block, gets reprieve from NASA

✇Astronomy Magazine
By: Randall Hyman
November 2nd 2024 at 1:00 am

Scientists breathed a collective sigh of relief last week when NASA announced that the Chandra X-ray Observatory had been spared the chopping block — at least for another year. It was an abrupt about-face from plans announced in March to decommission the space-based telescope by this December.  Much of the credit for the 11th-hour stayContinue reading "Chandra X-ray telescope, facing chopping block, gets reprieve from NASA"

The post Chandra X-ray telescope, facing chopping block, gets reprieve from NASA appeared first on Astronomy Magazine.

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