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Keyword: galaxies

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  • Astronomy Picture of the Day - The Heart Shaped Antennae Galaxies

    02/07/2024 12:51:33 PM PST · by MtnClimber · 13 replies
    NASA ^ | 7 Feb, 2024 | Image Credit & Copyright: Kent E. Biggs
    Explanation: Are these two galaxies really attracted to each other? Yes, gravitationally, and the result appears as an enormous iconic heart -- at least for now. Pictured is the pair of galaxies cataloged as NGC 4038 and NGC 4039,known as the Antennae Galaxies. Because they are only 60 million light years away, close by intergalactic standards, the pair is one of the best studied interacting galaxies on the night sky. Their strong attraction began about a billion years ago when they passed unusually close to each other. As the two galaxies interact, their stars rarely collide, but new stars are...
  • 'Big Ring' Structure, 9.2 Billion Light-Years Away, Captured In Image

    01/13/2024 9:50:37 PM PST · by Red Badger · 38 replies
    NDTV - India ^ | January 13, 2024 12:54 pm IST | Nikhil Pandey
    The identification of another ultra-large structure in remote space continues to defy our understanding of the cosmos. The Big Ring is made up of galaxies and galaxy clusters. Scientists have found an enormous ring-shaped structure called the Big Ring, positioned an astonishing 9.2 billion light-years away from Earth. This massive cosmic formation is made up of galaxies and clusters of galaxies, with a diameter of approximately 1.3 billion light-years and a total circumference of around 4 billion light-years. To help grasp its size, envision that if you could somehow observe the Big Ring directly, it would stretch across the night...
  • Astronomy Picture of the Day - Arp 87: Merging Galaxies from Hubble

    10/24/2023 5:45:09 PM PDT · by MtnClimber · 10 replies
    NASA ^ | 24 Oct, 2023 | Image Credit: NASA, ESA, Hubble; Processing: Harshwardhan Pathak
    Explanation: This dance is to the death. As these two large galaxies duel, a cosmic bridge of stars, gas, and dust currently stretches over 75,000 light-years and joins them. The bridge itself is strong evidence that these two immense star systems have passed close to each other and experienced violent tides induced by mutual gravity. As further evidence, the face-on spiral galaxy on the right, also known as NGC 3808A, exhibits many young blue star clusters produced in a burst of star formation. The twisted edge-on spiral on the left (NGC 3808B) seems to be wrapped in the material bridging...
  • Astronomers shocked to 'discover the impossible' from James Webb Space Telescope images: 'I nearly spit out my coffee'

    02/25/2023 11:25:03 AM PST · by Twotone · 90 replies
    The Blaze ^ | February 23, 2023 | Carlos Garcia
    Scientists say that images from the James Webb Space Telescope may change how they understand the origins of the universe after they discovered "the impossible." The findings were published in the journal "Nature" on Wednesday. Astronomers expected to find "tiny, young, baby galaxies" from the cosmic history documented in the images, but they found something else entirely. The study's lead author, Ivo Labbé, explained how shocked he was when he realized what the images meant. "Little did I know that among the pictures is a small red dot that will shake up our understanding of how the first galaxies formed...

    08/30/2022 3:45:27 PM PDT · by aimhigh · 153 replies
    The Byte ^ | 08/30/2022 | MAGGIE HARRISON
    Over the past several weeks, NASA's ultra-powerful James Webb Space Telescope (JWST) has allowed humankind some unprecedented glimpses into the farthest reaches of our universe. And unsurprisingly, some of these dazzling new observations have raised more questions than they've answered.For a long time, for instance, scientists believed the universe's earliest, oldest galaxies to be small, slightly chaotic, and misshapen systems. But according to the Washington Post, JWST-captured imagery has revealed those galaxies to be shockingly massive, not to mention balanced and well-formed — a finding that challenges, and will likely rewrite, long-held understandings about the origins of our universe. "The...
  • New discovery about distant galaxies: Stars are heavier than we thought

    05/26/2022 9:57:03 AM PDT · by LibWhacker · 27 replies
    University of Copenhagen ^ | 5/25/2022 | Charles Steinhardt, Albert Sneppen
    ASTROPHYSICS A team of University of Copenhagen astrophysicists has arrived at a major result regarding star populations beyond the Milky Way. The result could change our understanding of a wide range of astronomical phenomena, including the formation of black holes, supernovae and why galaxies die. The Andromeda galaxy, our Milky Way's closest neighbor, is the most distant object in the sky that you can see with your unaided eye. For as long as humans have studied the heavens, how stars look in distant galaxies has been a mystery. In a study published today in The Astrophysical Journal, a team of...
  • Two simpatico galaxies hold hands in this gorgeous view of space from Hubble

    10/10/2021 10:15:01 AM PDT · by American Number 181269513 · 37 replies
    Mashable ^ | October 9, 2021 | Adam Rosenberg
    These two galaxies are so tight, the stellar formation encompassing them both actually has a name of its own. Say hello to Arp 91, a pair of spiral galaxies that are situated so close together (in relative terms, space is big) we can actually see their outer arms reaching out and colliding with one another. BFFs on an intergalactic scale. Like a good marriage, these galaxies may share a name but they are their own individuals as well. In the center of the frame is NGC 5953. Just above it and slightly to the right is NGC 5954. They're both...
  • Largest Rotating Structures in the Universe Discovered – Fantastic Cosmic Filaments Where Galaxies Are Relatively Just Specs of Dust

    06/18/2021 11:32:28 AM PDT · by Red Badger · 34 replies ^ | By LEIBNIZ INSTITUTE FOR ASTROPHYSICS JUNE 16, 2021
    Artist’s impression of cosmic filaments: huge bridges of galaxies and dark matter connect clusters of galaxies to each other. Galaxies are funneled on corkscrew like orbits towards and into large clusters that sit at their ends. Their light appears blue-shifted when they move towards us, and red-shifted when they move away. Credit: AIP/ A. Khalatyan/ J. Fohlmeister ==================================================================================== By mapping the motion of galaxies in huge filaments that connect the cosmic web, astronomers at the Leibniz Institute for Astrophysics Potsdam (AIP), in collaboration with scientists in China and Estonia, have found that these long tendrils of galaxies spin on the...
  • A Ginormous Arc of Galaxies Was Just Detected in The Distant Universe

    06/18/2021 8:53:42 AM PDT · by Red Badger · 22 replies ^ | 18 JUNE 2021 | MICHELLE STARR
    The Universe is a large place, and there are a lot of large things in it. Not just galaxies, but groupings of galaxies, and the cosmic web that connects them all together. Scientists have just discovered what appears to be one of these groupings, and it could have serious implications for our understanding of the evolution of the Universe. It's an almost-symmetrical arc of galaxies at a distance of 9.2 billion light-years away, and, at 3.3 billion light-years across, it's one of the biggest structures ever identified. Astronomers are calling it the Giant Arc, and, if confirmed, it joins a...
  • Astronomical Images of Nebulae and Galaxies to Jeremiah Clark's 'Prince of Denmark's March'

    02/19/2020 10:57:36 AM PST · by mairdie · 11 replies
    YouTube ^ | Febuary 19, 2020 | MVD
    Astronomical Images of Nebulae and Galaxies to Jeremiah Clark's 'Prince of Denmark's March,' a Trumpet Voluntary. I am awed by the vastness and the beauty of space. A trumpet voluntary conveys that awe perfectly.
  • Dark matter exists: Observations disprove alternate explanations

    04/30/2019 8:34:49 PM PDT · by ETL · 26 replies ^ | International School of Advanced Studies (SISSA)
    Acceleration as a function of radius in NGC 4455, one of the studied galaxies As fascinating as it is mysterious, dark matter is one of the greatest enigmas of astrophysics and cosmologyIt is thought to account for 90 percent of the matter in the universe, but its existence has been demonstrated only indirectly, and has recently been called into question New research conducted by SISSA removes the recent doubts on the presence of dark matter within galaxies, disproving the empirical relations in support of alternative theories. The study, published in the Astrophysical Journal, also offers new insights into understanding the...
  • Hubble's dazzling display of two colliding galaxies

    03/08/2019 3:14:44 PM PST · by ETL · 64 replies ^ | March 8, 2019 | Rob Garner, NASA's Goddard Space Flight Center
    Located in the constellation of Hercules, about 230 million light-years away, NGC 6052 is a pair of colliding galaxies. They were first discovered in 1784 by William Herschel and were originally classified as a single irregular galaxy because of their odd shape. However, we now know that NGC 6052 actually consists of two galaxies that are in the process of colliding. This particular image of NGC 6052 was taken using the Wide Field Camera 3 on the NASA/ESA Hubble Space Telescope. A long time ago gravity drew the two galaxies together into the chaotic state we now observe. Stars from...
  • All disk galaxies rotate once every billion years

    09/29/2018 4:50:31 AM PDT · by LibWhacker · 40 replies
    Astronomy ^ | 3/13/18 | Jake Parks
    All disk galaxies rotate once every billion years By Jake Parks  |  Published: Tuesday, March 13, 2018 Grand spiral galaxy (NGC 1232). FORS/8.2-meter VLT Antu/ESO In a study published March 9 in The Monthly Notices of the Royal Astronomical Society, astronomers announced the discovery that all disk galaxies rotate about once every billion years, no matter their size or mass. “It’s not Swiss watch precision,” said Gerhardt Meurer, an astronomer from the International Centre for Radio Astronomy Research (ICRAR), in a press release. “But regardless of whether a galaxy is very big or very small, if you could sit on...
  • Astronomers Spot Two Massive Galaxies Surrounded by a Halo of Dark Matter at the Dawn of Time

    12/06/2017 11:31:18 AM PST · by Red Badger · 89 replies ^ | 12/06/2017 | By John Wenz
    Less than a billion years after the Big Bang, two titans speed toward each other. NRAO/AUI/NSF; D. Berry ======================================================================= Just 780 million years after the universe formed in the Big Bang, two galaxies speed to confront each other in a head-on collision that will lead to a merger between the two—and one of them is towing along a clump of dark matter larger than any spotted before. The research paper, published today in Nature, highlights a little-understood era of the universe known as the Epoch of Reionization. This is when the first galaxies came together and lit up the universe...
  • Half the atoms in every human are ALIEN in origin and come from outside the Milky Way

    07/27/2017 9:08:16 AM PDT · by SeekAndFind · 34 replies
    The Sun ^ | 07/27/2017 | By Jasper Hamill
    Every one of us contains alien atoms that originated in a galaxy far, far away, a new study suggests. Scientists have discovered that up to half the matter making up our galaxy, the Milky Way, used to belong to other clusters of stars. The sun, the Earth, and even our own bodies probably contain a large proportion of this galaxy-hopping material, which migrated to our part of the universe across vast expanses of space. Lead researcher Dr Daniel Angles-Alcazar, from Northwestern University in the US, said: “Given how much of the matter out of which we formed may have come...
  • The Universe Contains 10 to 20 Times More Galaxies Than We Thought

    10/15/2016 2:43:17 PM PDT · by LibWhacker · 78 replies
    Popular Mechanics ^ | 10/13/16 | Jay Bennett
    A new study from a team of international astronomers, led by astrophysicists from the University of Nottingham with support from the Royal Astronomical Society (RAS), has produced some astounding results: The universe contains at least two trillion galaxies, 10 times more than the highest previous estimates. What's more, the new study suggests that 90 percent of all galaxies are hidden from us, and only the remaining 10 percent can be seen at all, even with our most powerful telescopes. The paper detailing the study was published today in the Astrophysical Journal. "We are missing the vast majority of galaxies because...
  • In rotating galaxies, distribution of normal matter precisely determines gravitational acceleration

    09/22/2016 3:59:44 PM PDT · by sparklite2 · 32 replies
    Science Daily ^ | September 21, 2016 | Case Western Reserve University
    Now a team led by Case Western Reserve University researchers has found a significant new relationship in spiral and irregular galaxies: the acceleration observed in rotation curves tightly correlates with the gravitational acceleration expected from the visible mass only. "Galaxy rotation curves have traditionally been explained via an ad hoc hypothesis: that galaxies are surrounded by dark matter," said David Merritt, professor of physics and astronomy at the Rochester Institute of Technology, who was not involved in the research. "The relation discovered by McGaugh et al. is a serious, and possibly fatal, challenge to this hypothesis, since it shows that...
  • Hubble telescope unveils never before seen ‘monster stars’

    03/17/2016 6:19:51 PM PDT · by Ernest_at_the_Beach · 15 replies ^ | March 17, 2016 | Anthony Watts
    An international team of scientists using the NASA/ESA Hubble Space Telescope has combined images taken with the Wide Field Camera 3 (WFC3) with the unprecedented ultraviolet spatial resolution of the Space Telescope Imaging Spectrograph (STIS) to successfully dissect the young star cluster R136 in the ultraviolet for the first time [1].The image shows the central region of the Tarantula Nebula in the Large Magellanic Cloud. The young and dense star cluster R136 can be seen at the lower right of the image. This cluster contains hundreds of young blue stars, among them the most massive star detected in the...
  • Telescope used on Armstrong's moon landing finds new galaxies

    02/24/2016 5:09:08 PM PST · by Gamecock · 18 replies
    Reuters ^ | 2/24/2016 | PAULINE ASKIN
    An Australian telescope used to broadcast live vision of man's first steps on the moon in 1969 has found hundreds of new galaxies hidden behind the Milky Way by using an innovative receiver that measures radio waves. Scientists at the Parkes telescope, 355 km (220 miles) west of Sydney, said they had detected 883 galaxies, a third of which had never been seen before. The findings were reported in the latest issue of Astronomical Journal under the title 'The Parkes HI Zone of Avoidance Survey'. "Hundreds of new galaxies were discovered, using the same telescope that was used to broadcast...
  • The mystery of the naked black hole

    01/06/2016 6:59:33 PM PST · by Utilizer · 38 replies
    AAAS Science ^ | 5 January 2016 2:45 pm | Daniel Clery
    KISSIMMEE, FLORIDA--Most, if not all, galaxies have supermassive black holes at their centers surrounded by dense clouds of stars. Now, researchers have found one that seems to have lost almost its entire entourage. The team, which reported its find here today at the annual meeting of the American Astronomical Society, says it doesn't know what stripped the stars away. But it has put forward a tantalizing possibility: The object could be an extremely rare medium-sized black hole, which theorists have predicted but observers have never seen. The unusual black hole sits about 1 billion light-years from Earth in SDSS J1126+2944,...