Keyword: galaxies

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  • 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,...
  • Super Spiral Galaxies Amaze Astronomers

    12/09/2015 7:35:23 PM PST · by MtnClimber · 41 replies
    Scientific American ^ | 8 Dec, 2015 | KEN CROSWELL
    They're big, they're bright, they're beautiful—and they shouldn't even exist, at least to our current astronomical knowledge: gargantuan spiral galaxies that make our giant Milky Way seem downright modest. Spirals are supposed to be small fry compared to the greatest giant ellipticals, which are football-shaped swarms of stars thought to be the universe’s biggest and brightest galaxies. But now a search across billions of light-years has snared a rare breed of "super spiral" galaxies that rival their giant elliptical peers in size and luminosity, raising questions over how such behemoths are born. "I was really surprised," says Patrick Ogle, an...
  • Astronomers Discover a New Class of Freakishly Dense, Compact Galaxies

    08/04/2015 9:56:58 PM PDT · by LibWhacker · 8 replies
    io9 ^ | 7/28/15 | George Dvorsky
    Imagine what our night sky would look like if its stellar density was a million times greater than it is now. Remarkably, such places actually exist: They’re called “Ultracompact Dwarfs,” and astronomers are calling them an entirely new kind of galaxy. Undergraduate astronomy students Michael Sandoval and Richard Vo from San José University discovered a pair of record-breaking compact galaxies buried within data contained in the Sloan Digital Sky Survey. These exotic objects are similar to ordinary globular clusters, but upwards of a hundred to a thousand times brighter. Advertisement Image: The two ultra-dense compact galaxies were discovered orbiting...
  • Astronomers find runaway galaxies

    04/24/2015 10:30:47 AM PDT · by LibWhacker · 6 replies ^ | 4/23/15
    Astronomers find runaway galaxies 21 hours ago Enlarge This schematic illustrates the creation of a runaway galaxy. In the first panel, an "intruder" spiral galaxy approaches a galaxy cluster center, where a compact elliptical galaxy (cE) already revolves around a massive central elliptical galaxy. In the second panel, a close encounter occurs and the compact elliptical receives a gravitational kick from the intruder. In the third panel, the compact elliptical escapes the galaxy cluster while the intruder is devoured by the giant elliptical galaxy in the cluster center. Read more at: We know of about two dozen runaway stars,...
  • Astronomers find 'new' dwarf galaxy in Milky Way's neighborhood

    12/27/2014 4:18:14 PM PST · by BenLurkin · 37 replies ^ | Amina Khan
    Astronomers searching the sky with NASA’s Hubble Space Telescope have discovered an odd little dwarf galaxy in our very own backyard -- a mere 7 million light years away.. ... Given that these isolated dwarf spheroidal galaxies are so hard to find, there could be many more of these fascinating galactic fossils just hanging out in the darkness of our own intergalactic neighborhood, just waiting to be found,
  • Lost in Space: Half of All Stars Are Rogues Between Galaxies

    11/07/2014 1:26:34 PM PST · by BenLurkin · 13 replies ^ | Charles Q. Choi
    A star mystery solved? These newfound stars could help solve the so-called "photon underproduction crisis," which suggests that an extraordinary amount of ultraviolet light appears to be missing from the universe. The intergalactic stars could also help address what is known as the "missing baryon problem." Baryons are a class of subatomic particles that includes the protons and neutrons that make up the hearts of atoms inside normal matter. Theories of the formation and evolution of the universe predict there should be far more baryons than scientists currently see. The baryons that astronomers have accounted for in the local cosmic...
  • Billyuns and Billyuns of Galaxy Images and More Portend The End of The Boring Space Picture

    01/10/2014 8:14:31 PM PST · by lbryce · 18 replies
    National Optical Astronomy Obsevatory ^ | January 10, 2014 | Staff
    Breathtaking space pictures don't necessarily start snd end at APOD. There are countless astronomy sources that offer imagery of the Cosmos catalogued in different ways, like the National Optical Astronomy Obsevatory, NOAO. NOAO is the US national research & development center for ground-based night time astronomy. In particular, NOAO is enabling the development of the US optical-infrared (O/IR) System, an alliance of public and private observatories allied for excellence in scientific research, education and public outreach. Our core mission is to provide public access to qualified professional researchers via peer-review to forefront scientific capabilities on telescopes operated by NOAO as...
  • Astronomy Picture of the Day -- Three Galaxies in Draco

    10/17/2013 4:24:19 PM PDT · by SunkenCiv · 4 replies
    NASA ^ | October 16, 2013 | (see photo credit)
    Explanation: This intriguing trio of galaxies is sometimes called the Draco Group, located in the northern constellation of (you guessed it) Draco. From left to right are edge-on spiral NGC 5981, elliptical galaxy NGC 5982, and face-on spiral NGC 5985 -- all within this single telescopic field of view spanning a little more than half the width of the full moon. While the group is far too small to be a galaxy cluster and has not been catalogued as a compact group, these galaxies all do lie roughly 100 million light-years from planet Earth. On close examination with spectrographs, the...
  • Study Provides New Insights into Origin of Spiral Arms in Disk Galaxies

    04/03/2013 6:41:23 PM PDT · by SunkenCiv · 10 replies
    Sci-News ^ | April 3, 2013 | unattributed
    U.S. astrophysicists report computer simulations that seem to resolve long-standing questions about the origin and life history of spiral arms in disk galaxies. The origin and fate of the spiral arms in disk galaxies have been debated by astrophysicists for decades, with two theories predominating. One holds that the arms come and go over time. A second and widely held theory is that the material that makes up the arms – stars, gas and dust – is affected by differences in gravity and jams up, like cars at rush hour, sustaining the arms for long periods. The new findings, accepted...
  • Thirteen little galaxies all in a row: Configuration deviates from the expected...

    01/06/2013 8:06:50 PM PST · by LibWhacker · 36 replies
    Vancouver Sun ^ | 1/6/13 | Randy Shore
    A string of 13 dwarf galaxies are in orbit around the galaxy Andromeda. The galaxies are spread across a flat plane more than one million light years wide and 30,000 light years thick, moving in synchonicity with each other. The phenomenon is unlike behaviour of other observed galaxies and suggests a hole in our knowledge of galaxy formation. A string of 13 dwarf galaxies in orbit around the massive galaxy Andromeda are not behaving as they should. The galaxies are spread across a flat plane more than one million light years wide and only 30,000 light years thick, moving...
  • Undead galaxy cluster spews 700 zombie baby stars A YEAR

    08/16/2012 10:08:59 AM PDT · by Ernest_at_the_Beach · 19 replies
    The Register ^ | 16th August 2012 11:19 GMT | Brid-Aine Parnell
    Astroboffins have spotted a galaxy cluster that's breaking all the cosmic rules, including coming back to life to spawn stars at an enormous rate. The Phoenix cluster is spewing out the celestial bodies at the highest rate ever observed for the middle of a galaxy cluster; it's the most powerful producer of X-rays of any known cluster; it's one of the most massive of its kind; and the rate of hot gas cooling in the central regions is the largest ever observed. According to the scientists, the cluster is "experiencing a massive starburst" that's forming the equivalent of 740 Suns...
  • Galaxy Cluster Stuns Scientists—Supermassive and Spewing Out Stars

    08/15/2012 11:05:48 PM PDT · by Berlin_Freeper · 29 replies ^ | August 15, 2012 | Andrew Fazekas
    It seemed too good to be true: a superbright newfound galaxy cluster possibly more massive than any other known, forging fresh stars nearly a thousand times faster than normal.
  • How Black Holes Shape the Galaxies, Stars and Planets around Them

    07/26/2012 7:17:56 PM PDT · by LibWhacker · 13 replies
    Scientific American ^ | 7/17/12 | Caleb Scharf
    The matter-eating beast at the center of the Milky Way may actually account for Earth's existence and habitabilityAdapted from Gravity’s Engines: How Bubble-Blowing Black Holes Rule Galaxies, Stars, and Life in the Cosmos, by Caleb ScharfOur existence in this place, this microscopic corner of the cosmos, is fleeting. with utter disregard for our wants and needs, nature plays out its grand acts on scales of space and time that are truly hard to grasp. Perhaps all that we can look to for real solace is our endless capacity to ask questions and seek answers about the place we find ourselves...
  • 'Starbursts' and black holes lead to biggest galaxies

    01/25/2012 2:08:21 PM PST · by NormsRevenge · 21 replies · 2+ views
    BBC News ^ | 1/25/12 | BBC
    Frenetic star-forming activity in the early Universe is linked to the most massive galaxies in today's cosmos, new research suggests. This "starbursting" activity when the Universe was just a few billion years old appears to have been clamped off by the growth of supermassive black holes. An international team gathered hints of the mysterious "dark matter" in early galaxies to confirm the link. The findings appear in Monthly Notices of the Royal Astronomical Society. ... Using the 12-metre Atacama Pathfinder Experiment telescope in Chile, an international team led by Ryan Hickox of Dartmouth College studied the way distant galaxies from...
  • Mystery Behind Gigantic Space Blob Revealed (Images and Videos)

    08/18/2011 1:30:33 AM PDT · by lbryce · 9 replies
    International Business Times ^ | August 18, 2011 | Staff
    The mystery behind the power source of the giant "Lyman-alpha blob," one of the largest single objects known in the universe, has finally been revealed by astronomers at the European Southern Observatory. Observations from ESO's Very Large Telescope have led to the conclusion that rare vast cloud of glowing gas from the earliest days of the universe must be powered by galaxies embedded within it. The results appear in the Aug. 18 issue of the journal Nature. Lyman-alpha blobs are huge gaseous structures emitting Lyman-alpha frequency light. Some of these are more than 400,000 light years across in size....
  • NASA Photos Bring Millions of Galaxies and Asteroids Down to Earth

    04/18/2011 4:49:57 PM PDT · by LibWhacker · 2 replies ^ | 4/15/11 | Clara Moskowitz
    NASA has unveiled a flood of photos showing millions galaxies, stars and asteroids photographed by a prolific sky-mapping telescope that ended its mission earlier this year. For the first time, the space agency publicly released more than half of the 2.7 million images taken by its Wide-field Infrared Survey Explorer (WISE) telescope during its mission to map the entire sky. WISE launched in December 2009 and spent 14 months scanning the heavens in infrared light before shutting down this past February. The $320 million space telescope hunted for asteroids and comets, as well as more distant cosmic objects revealed by...
  • The Great Walls -- Largest Structures in the Universe: "Do They Contradict Big Bang Theory?"

    03/31/2011 11:50:50 AM PDT · by LibWhacker · 68 replies
    Daily Galaxy ^ | 3/31/11 | Casey Kazan and the Daily Galaxy staff
    “Just as a fish may be barely aware of the medium in which it lives and swims, so the microstructure of empty space could be far too complex for unaided human brains." -- Sir Martin Rees, Astronomer Royal, physicist, Cambridge University Our known Hubble length universe contains hundreds of millions of galaxies that have clumped together, forming super clusters and a series of massive walls of galaxies separated by vast voids of empty space. Great Wall: The most vast structure ever is a collection of superclusters a billion light years away extending for 5% the length of the entire observable...
  • Image of the Day: Galaxies Beyond Comprehension (and Seven-Trillion Dwarfs!)

    02/18/2011 10:01:33 AM PST · by LibWhacker · 26 replies
    Daily Galaxy ^ | 2/17/11
    Image of the Day: Galaxies Beyond Comprehension (and Seven-Trillion Dwarfs!)   ESA’s Herschel space telescope has discovered that previously unseen distant galaxies are responsible for a cosmic fog of infrared radiation. The galaxies are some of the faintest and furthest objects seen by Herschel, and open a new window on the birth of stars in the early Universe. Astronomers estimate that their are billions and billions of galaxies in the observable universe (as well as some seven trillion dwarf galaxies) . Here's the breakout of the visible universe within 14 billion light years: Superclusters in the visible universe =...
  • A Deep-Sky Look at Lensing

    01/13/2011 10:56:04 AM PST · by LibWhacker · 2 replies
    Centauri Dreams ^ | 1/13/11 | Paul Gilster
    A Deep-Sky Look at Lensing by Paul Gilster on January 13, 2011 As we continue to investigate the parameters of the proposed FOCAL mission to the SunÂ’s gravitational lens, itÂ’s worth recalling how the idea of lensing has taken hold in recent decades. Einstein noted the possibilities of such lensing as far back as 1936, but it wasnÂ’t until 1964 that Sydney Liebes (Stanford University) worked out the mathematical theory, explaining how a galaxy between the Earth and an extremely distant object like a quasar could focus the latterÂ’s light in ways that should be detectable by astronomers. And...
  • Spectacular spiral galaxies more than 60million light years away

    10/30/2010 9:03:41 PM PDT · by fightinJAG · 42 replies
    Daily Mail (U.K.) ^ | Oct. 29, 2010 | Staff
    Displayed in all their exquisite detail, six spectacular galaxies are pictured more clearly that they ever have before. All of them are beautiful examples of spiral galaxies and were captured in images from ESO’s Very Large Telescope (VLT) at the Paranal Observatory in Chile. The pictures were taken in infrared light, using the impressive power of the HAWK-I camera, and will help astronomers understand how the remarkable spiral patterns in galaxies form and evolve.-incredible-new-detail.html#ixzz13uAfNijg
  • Total Amateurs Discover 'Green Pea' Galaxies

    07/28/2009 8:50:08 AM PDT · by NormsRevenge · 6 replies · 494+ views ^ | 7/27/09
    Armchair astronomers have helped discover a batch of tiny galaxies that may help professional astronomers understand how galaxies formed stars in the early universe. Dubbed the "Green Peas," the galaxies are forming stars 10 times faster then the Milky Way despite being 10 times smaller and 100 times less massive. They are between 1.5 billion and 5 billion light years away "These are among the most extremely active star-forming galaxies we've ever found," said Carolin Cardamone, lead author of a paper on the discoveries to be published in an upcoming issue of the Monthly Notices of the Royal Astronomical Society....
  • Astronomers: Dark Matter Guides Universe's Structure

    04/05/2009 12:46:41 PM PDT · by BuckeyeTexan · 31 replies · 1,223+ views
    Information Week ^ | 04/05/2009 | Bob Evans
    A 10-year study of 100,000 galaxies close to our own offers compelling proof that long-hypothesized "dark matter" does exist and is in fact a guiding force behind the structure of the universe, a team of Australian, British, and American astronomers revealed this week. Saying that "the universe we see is really quite structured," one of the lead researchers explained that the 10-year "census" of galaxies near our own Milky Way offers powerful evidence that this invisible dark matter "seems to hold the galaxies together." The dark matter's influence on galaxies "stops their constituent stars from flying off and it seems...
  • Do dwarf galaxies favour MOND over dark matter?

    04/03/2008 8:16:25 PM PDT · by LibWhacker · 16 replies · 129+ views
    A detailed analysis of eight dwarf galaxies that orbit the Milky Way indicates that their orbital behaviour can be explained more accurately with Modified Newtonian Dynamics (MOND) than by the rival, but more widely accepted, theory of dark matter. The results were presented by Garry Angus, of the University of St Andrews, at the RAS National Astronomy Meeting in Belfast on Wednesday 2nd April. 'MOND was first suggested to account for things that we see in the distant universe. This is the first detailed study in which we've been able to test out the theory on something close to home....
  • Perfectly Aligned Galaxies Found For The First Time

    01/11/2008 6:29:35 PM PST · by blam · 18 replies · 160+ views
    National Geographic News ^ | 1-11-2008 | John Roach
    Perfectly Aligned Galaxies Found For the First Time John Roach for National Geographic NewsJanuary 11, 2008 Astronomers have found three galaxies in a never before seen perfect alignment—a discovery that may help scientists better understand the mysterious dark matter and dark energy believed to dominate the universe. The three galaxies are like beads on a string, one directly behind the other, scientists announced yesterday at a meeting of the American Astronomical Society in Austin, Texas. This makes the massive galaxy closest to Earth appear nestled in a pair of circular halos known as Einstein rings. The phenomenon occurs because the...
  • Scientists discover 'teenager galaxies'

    11/28/2007 7:12:49 PM PST · by NormsRevenge · 15 replies · 32+ views
    AP on Yahoo ^ | 11/28/07 | Raphael G. Satter - ap
    LONDON - Young galaxies, so faint that scientists struggled to prove they were there at all, have been discovered by aiming two of the world's most powerful telescopes at a single patch of sky for nearly 100 hours. An international group of researchers has identified 27 pre-galactic fragments, dubbed "teenager galaxies," which they hope will help astronomers understand how our own Milky Way reached adulthood. Cambridge University scientist Martin Haehnelt said his team used the European Southern Observatory's Very Large Telescope and the Gemini Telescope in Chile to monitor a section of the universe for 92 hours — the equivalent...
  • Black Holes Launch Powerful Cosmic Winds

    11/05/2007 7:04:25 PM PST · by NormsRevenge · 5 replies · 96+ views on Yahoo ^ | 11/05/07 | Charles Q. Choi
    Black holes often are thought of as just endless pits in space and time that destroy everything they pull toward them. But new findings confirm the reverse is true, too: Black holes can drive extraordinarily powerful winds that push out and force star formation and shape the fate of a galaxy. Supermassive black holes are suspected to lurk in the hearts of many—if not all—large galaxies. These holes drag gas inward, which accrues in rapidly spinning, glowing disks. Astronomers have long thought that such "accretion disks" give off mighty winds that shape the host galaxies, profoundly influencing how they grow....
  • Vatican pulls top astronomers into its orbit for galaxy conference

    10/04/2007 1:59:00 PM PDT · by NYer · 4 replies · 456+ views
    CNS ^ | October 4, 2007 | Carol Glatz
    ROME (CNS) -- The Vatican Observatory called together some of the world's top astronomers for a major conference on the creation and evolution of disk galaxies in an effort to better understand the nature of the universe. More than 200 men and women from 26 countries attended the Oct. 1-5 conference in Rome to share some of the discoveries since the Vatican's last galaxy conference in 2000. The observatory director, Argentine Jesuit Father Jose Funes, said they were able to attract top scientists and scholars for the meeting because "the Vatican Observatory is a prestigious institute, and the Holy See...
  • 200,000 Elliptical Galaxies Point the Same Way

    08/30/2007 6:47:29 PM PDT · by jbp1 · 122 replies · 2,951+ views ^ | 29 aug 2007 | KJ Longo
    I have studied a sample of 200,000 elliptical galaxies with redshifts <0.20 from the Sloan Digital Sky Survey (SDSS) to investigate whether they tend to have their ellipticities aligned along a particular axis. The data show a 13 standard deviation signal for such an alignment. The axis is close to the spiral spin axis found previously and to that of the quadrupole and octopole moments in the WMAP microwave sky survey
  • Black Holes Devour Matter Like Piranhas

    07/25/2007 8:23:36 AM PDT · by Alter Kaker · 14 replies · 723+ views ^ | 24 July 2007 | Ker Than
    Like gluttonous piranhas, supermassive black holes in young galaxy clusters gorge on bountiful gas until little fuel is left, and then they fade away, a new study suggests.Using NASA's Chandra X-ray Observatory, astronomers tallied the number of rapidly growing supermassive black holes, called active galactic nuclei, or AGN, in two populations of galaxy clusters. One group consisted of young-looking clusters located very far from Earth, and the other consisted of an older group located closer to us. The results of the survey, detailed in the July 20 issue of The Astrophysical Journal Letters, showed that the more distant, younger clusters...
  • Astronomers Find Farthest Known Galaxies

    07/10/2007 2:52:26 PM PDT · by NormsRevenge · 23 replies · 1,213+ views on Yahoo ^ | 7/10/07 | Robert Roy Britt
    Astronomers have found evidence for the most distant galaxies ever detected. The galaxies are seen as they existed just 500 million years after the birth of the universe. Their light, traversing the cosmos for more than 13 billion years, was seen only because it was distorted in a natural "gravitational lens" created by the gravity-bending mass of a nearer cluster of galaxies. "Gravitational lensing is the magnification of distant sources by foreground structures," explained Caltech astronomer Richard Ellis, who led the international team. "By looking through carefully selected clusters, we have located six star-forming galaxies seen at unprecedented distances, corresponding...
  • New image gives insight into colliding galaxies (Hubble and Antennae galaxies)

    10/17/2006 9:35:22 PM PDT · by NormsRevenge · 8 replies · 613+ views
    Reuters on Yahoo ^ | 10/17/06 | Reuters
    WASHINGTON (Reuters) - A seemingly violent collision of two galaxies is in fact a fertile marriage that has birthed billions of new stars, and an image released on Tuesday gives astronomers their best view yet. The new image of the Antennae galaxies allows astronomers working with the orbiting Hubble Space Telescope to distinguish between new stars and the star clusters that form them. Most of these clusters, created in the collision of the two galaxies, will disperse within 10 million years but about 100 of the largest will grow into "globular clusters" -- large groups of stars found in many...
  • Newfound Blob is Biggest Thing in the Universe

    07/30/2006 8:22:20 AM PDT · by Excuse_My_Bellicosity · 58 replies · 2,345+ views ^ | 27 July 2006 | Ker Than
    An enormous amoeba-like structure 200 million light-years wide and made up of galaxies and large bubbles of gas is the largest known object in the universe, scientists say. The galaxies and gas bubbles, called Lyman alpha blobs, are aligned along three curvy filaments that formed about 2 billion years after the universe exploded into existence after the theoretical Big Bang. The filaments were recently seen using the Subaru and Keck telescopes on Mauna Kea. The galaxies within the newly found structure are packed together four times closer than the universe's average. Some of the gas bubbles are up to 400,000...
  • The End of Small Galaxies

    05/22/2006 7:26:49 PM PDT · by KevinDavis · 8 replies · 251+ views ^ | 05/22/06 | Sara Goudarzi
    When the universe was young, countless dwarf galaxies formed, heating the universe and preventing the formation of more small galaxies, a new study suggests. The Big Bang, a theoretical beginning to the universe, is thought to have generated lots of hot stuff—electrons and hydrogen and helium ions. The material expanded rapidly. As space expanded, matter cooled, and the electrons and ions formed neutral atoms and absorbed surrounding light. This placed a dark curtain throughout space. The shadowy era is called the Dark Ages.
  • Ongoing Growth: Galaxies Grab Intergalactic Gas

    02/06/2006 5:18:18 PM PST · by KevinDavis · 9 replies · 238+ views ^ | 02/06/06 | Ker Than
    Astronomers have detected a faint halo of hot gas surrounding and falling into a spiral galaxy located 100 million light-years from Earth. The discovery provides a long-sought missing link in theories of galaxy formation and helps solve the riddle of where galaxies get the fuel they need to create new stars billions of years after they have already formed. "What we are likely witnessing here is the ongoing galaxy formation process," said study leader Kristian Pedersen of the University of Copehnhagen, Denmark. The spherical gas halo was found centered on the nucleus of NGC 5746, a spiral galaxy like our...
  • Strange Setup: Andromeda's Satellite Galaxies All Lined Up

    01/24/2006 6:31:08 PM PST · by KevinDavis · 35 replies · 1,406+ views ^ | 01/23/06 | Ker Than
    An unusually high number of galaxies are aligned along a single plane running through the center of the giant Andromeda galaxy. Scientists don’t have a theory to explain why. Galactic cannibalism or dark matter may be responsible, researchers say. The Andromeda galaxy is located at a distance of 2.5 million light-years away and is the nearest spiral galaxy to the Milky Way. Like our own galaxy, Andromeda is surrounded by numerous dwarf galaxy satellites. Many of these satellites are within 1.3 million light-years or less of the galaxy’s main disk. Using the Hubble Space Telescope, Eva Grebel and Andrew Koch...
  • Milky Way's warp caused by interloping galaxies

    01/09/2006 8:54:01 PM PST · by NormsRevenge · 9 replies · 337+ views
    Reuters on Yahoo ^ | 1/9/06 | Deborah Zabarenko
    WASHINGTON (Reuters) - The Milky Way is warped -- like a bowl, a saddle or the brim of a fedora hat, depending on when you look -- and a pair of interloping galaxies may be to blame, astronomers said on Monday. Earth is in a fairly non-warped neighborhood, because it lies relatively close to the center of the Milky Way's disk, said Leo Blitz of the University of California, Berkeley. But the far-flung reaches of the galaxy could be caught up in a warp of as much as 20,000 light-years. A light-year is about 6 trillion miles, the distance light...
  • Are We A Privileged Planet? - (are we "alone" among billions of galaxies, stars & planets?)

    06/10/2005 8:04:42 PM PDT · by CHARLITE · 108 replies · 2,004+ views
    For a few moments there, “Intelligent Design” seemed to be making headway. Two weeks ago, the Smithsonian announced it would screen the movie, “The Privileged Planet,” produced by the Discovery Institute, at the National Museum of History on June 23rd. The outcry in the New York Times and The Washington Post was immediate. The Smithsonian was caving to religious fundamentalists. “While `The Privileged Planet’ is an extremely sophisticated religious film, it is a religious film nevertheless,” pronounced The Post in an editorial entitled “Dissing Darwin.” Within a week, the Smithsonian had yielded to liberal opinion. It cancelled its “co-sponsorship” of...
  • It Orbits a Star, but Does It Qualify for Planethood?

    04/05/2005 5:17:35 PM PDT · by neverdem · 14 replies · 619+ views
    NY Times ^ | April 5, 2005 | DENNIS OVERBYE
    Astronomers have produced what they say could be the first direct image of a planet around another Sun-like star. But the work has touched off intense debate about whether the orbiting object's mass has been determined accurately enough to count as a planet. At issue is a reddish object that appears to be orbiting GQ Lup, a very young star about 450 light-years from here in the constellation Lupus. In marked contrast to other extrasolar planets that have been detected in recent years racing around in scorching proximity to their home stars, the new planet is 20 times as far...
  • 'Red and dead' galaxies surprise astronomers

    03/12/2005 11:53:27 AM PST · by LibWhacker · 19 replies · 769+ views
    New Scientist ^ | 3/11/05 | Maggie McKee
    The corpses of three "dead" galaxies - which to the surprise of astronomers stopped forming stars long ago - have been identified by the Spitzer Space Telescope during a survey of the distant, early universe. The find bolsters a theory that colossal black holes can starve galaxies of the gas needed to create new stars. An infrared telescope on Earth first found the galaxies two years ago. They appeared red - a sign that most of their stars were old. But our planet's own heat clouded the observations, making it impossible to rule out whether dust was obscuring the light...
  • NASA Scientists find galaxies 11 billion light-years away (Spitzer Space Telescope)

    03/01/2005 9:32:59 PM PST · by NormsRevenge · 11 replies · 736+ views
    Bakersfield Californian ^ | 3/1/05 | AP - Los Angeles
    LOS ANGELES (AP) - NASA scientists used an infrared telescope to see past stardust and spot hidden galaxies more than 11 billion light-years from the Earth, according to a journal article published Tuesday. Scientists used the Spitzer Space Telescope to find the galaxies, the most luminous in the universe. The galaxies shine with light equivalent to 10 trillion suns but were too far away and too drenched in cosmic dust to be seen - until now. "We are seeing galaxies that are essentially invisible," said Professor Dan Weedman of Cornell University, in Ithaca, N.Y. Weedman co-authored an article detailing the...
  • “Ripples” of galaxies—another blow to the big bang

    02/16/2005 9:11:58 AM PST · by DannyTN · 79 replies · 1,936+ views
    AiG-USA ^ | 02/16/05 | Dr. Jason Lisle (Ph.D., astrophysics)
    “Ripples” of galaxies—another blow to the big bang by Dr. Jason Lisle (Ph.D., astrophysics), AiG–USA February 16, 2005 Astronomers have recently claimed to detect a “ripple” pattern in the clustering of galaxies in the Sloan Digital Sky Survey (SDSS).1 They claim this pattern is a result of sound waves produced during the big bang. However, as with all things, it is important to distinguish between the data and the interpretation. The new discovery does not support the big bang, and is in fact perfectly consistent with biblical creation. Background All the stars you see in the nighttime sky are part...
  • Watching as Dusty Disks Slowly Turn Into Planets

    12/21/2004 9:32:45 AM PST · by neverdem · 34 replies · 1,041+ views
    NY Times ^ | December 21, 2004 | DENNIS OVERBYE
    Astronomers think they know what goes into making a planetary system, namely dust - lots of it - swirling around a newly minted star. So it has been encouraging that astronomers have detected and even photographed dusty disks around many nearby stars, and they have inferred the presence of more than 100 planets around other stars. But until recently they had never seen dust and planets around the same stars. This month, astronomers said they had closed the loop. New observations by the Hubble Space Telescope and the Spitzer Space Telescope of dusty disks around nearby stars, they said, had...
  • Hubble's deepest shot is a puzzle

    09/24/2004 8:17:42 AM PDT · by Michael_Michaelangelo · 185 replies · 4,552+ views
    BBC News ^ | 9/23/04 | Staff
    Scientists studying the deepest picture of the Universe, taken by the Hubble Space Telescope, have been left with a big poser: where are all the stars? The Ultra Deep Field is a view of one patch of sky built from 800 exposures. The picture shows faint galaxies whose stars were shining just a few hundred million years after the Big Bang. "Our results based on the Ultra Deep Field are very intriguing and quite a puzzle," says Dr Andrew Bunker, of Exeter University, UK, who led a team studying the new data." "They're certainly not what I expected, nor what...
  • Hubble's deepest view ever unveils earliest galaxies (Ultra-deep field)

    03/09/2004 11:11:27 AM PST · by alnitak · 46 replies · 1,424+ views
    SpaceFlight Now ^ | March 9, 2004 | unknown author
    Hubble's deepest view ever unveils earliest galaxiesSPACE TELESCOPE SCIENCE INSTITUTE NEWS RELEASEPosted: March 9, 2004 Astronomers at the Space Telescope Science Institute today unveiled the deepest portrait of the visible universe ever achieved by humankind. Called the Hubble Ultra Deep Field (HUDF), the million-second-long exposure reveals the first galaxies to emerge from the so-called "dark ages," the time shortly after the big bang when the first stars reheated the cold, dark universe. The new image should offer new insights into what types of objects reheated the universe long ago. This view of nearly 10,000 galaxies is the deepest visible-light image...
  • Astronomy Picture of the Day 03-09-04

    03/09/2004 5:24:14 AM PST · by petuniasevan · 9 replies · 260+ views
    NASA ^ | 03-09-04 | Robert Nemiroff and Jerry Bonnell
    Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2004 March 9 The Hubble Ultra Deep Field (Pending) Credit: S. Beckwith & the HUDF Working Group (STScI), HST, NASA Explanation: The above picture will be replaced later today (between 9 and 10 am EST) by the newly released Hubble Ultra Deep Field (HUDF). The HUDF is expected to be the deepest image of the universe ever taken in visible light. It is expected to show a sampling...
  • Astronomy Picture of the Day 02-03-04

    02/02/2004 9:28:40 PM PST · by petuniasevan · 5 replies · 340+ views
    NASA ^ | 02-03-04 | Robert Nemiroff and Jerry Bonnell
    Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2004 February 3 X-Rays From Antennae Galaxies Credit: G. Fabbiano (CfA) et al., CXC, SAO, NASA Explanation: A bevy of black holes and neutron stars shine as bright, point-like sources against bubbles of million degree gas in this false-color x-ray image from the orbiting Chandra Observatory. The striking picture spans about 80 thousand light-years across the central regions of two galaxies, NGC 4038 and NGC 4039, locked in...