Free Republic 2nd Quarter Fundraising Target: $88,000 Receipts & Pledges to-date: $49,432
56%  
Woo hoo!! And we're now over 56%!! Thank you all very much!! God bless.

Keyword: astronomers

Brevity: Headers | « Text »
  • Astronomers discover new kind of supernova

    03/26/2013 3:17:46 PM PDT · by LibWhacker · 22 replies
    PhysOrg ^ | 3/26/13
    Astronomers discover new kind of supernova March 26, 2013 EnlargeThis artist's conception shows the suspected progenitor of a new kind of supernova called Type Iax. Material from a hot, blue helium star at right is funneling toward a carbon/oxygen white dwarf star at left, which is embedded in an accretion disk. In many cases the white dwarf survives the subsequent explosion. Credit: Christine Pulliam (CfA) (Phys.org) —Supernovae were always thought to occur in two main varieties. But a team of astronomers including Carnegie's Wendy Freedman, Mark Phillips and Eric Persson is reporting the discovery of a new type of supernova...
  • How Big is the Sun, Really?

    03/23/2012 1:29:41 AM PDT · by U-238 · 28 replies · 3+ views
    Sky and Telescope ^ | 3/21/2012 | Kelly Beatty
    With all the attention that astronomers have lavished on old Sol over the centuries, you'd think that by now they'd know its diameter to, oh, 10 or 12 significant digits. During the past 40 years, astronomers have attempted to measure the Sun's sizedozens of times using various methods. The dashed line corresponds to a radius of 696,000 km, the value most often used. While the Sun's girth has indeed been measured dozens of times over the past 40 years, the results haven't converged on a single value and scatter by as much as ± 0.1%. One big reason is that,...
  • Astronomers discover planet made of diamond

    08/25/2011 12:32:57 PM PDT · by NormsRevenge · 36 replies
    Reuters.com ^ | 8/25/11 | Ben Hirschler - Reuters
    Astronomers have spotted an exotic planet that seems to be made of diamond racing around a tiny star in our galactic backyard. The new planet is far denser than any other known so far and consists largely of carbon. Because it is so dense, scientists calculate the carbon must be crystalline, so a large part of this strange world will effectively be diamond. "The evolutionary history and amazing density of the planet all suggest it is comprised of carbon -- i.e. a massive diamond orbiting a neutron star every two hours in an orbit so tight it would fit inside...
  • Astronomers Find Largest, Oldest Mass of Water in Universe

    07/22/2011 8:44:00 PM PDT · by NormsRevenge · 43 replies
    Space.com ^ | 7/22/11
    Astronomers have discovered the largest and oldest mass of water ever detected in the universe — a gigantic, 12-billion-year-old cloud harboring 140 trillion times more water than all of Earth's oceans combined. The cloud of water vapor surrounds a supermassive black hole called a quasar located 12 billion light-years from Earth. The discovery shows that water has been prevalent in the universe for nearly its entire existence, researchers said. "Because the light we are seeing left this quasar more than 12 billion years ago, we are seeing water that was present only some 1.6 billion years after the beginning of...
  • US astronomers launch search for alien life on 86 planets

    05/14/2011 9:41:28 PM PDT · by LibWhacker · 14 replies
    PhysOrg ^ | 5/14/11 | Kerry Sheridan
    A massive radio telescope in rural West Virginia has begun listening for signs of alien life on 86 possible Earth-like planets, US astronomers said Friday.The giant dish began this week pointing toward each of the 86 planets -- culled from a list of 1,235 possible planets identified by NASA's Kepler space telescope -- and will gather 24 hours of data on each one. "It's not absolutely certain that all of these stars have habitable planetary systems, but they're very good places to look for ET," said University of California at Berkeley graduate student Andrew Siemion. The mission is part of...
  • Crab Nebula's gamma-ray flare mystifies astronomers

    05/11/2011 9:03:57 PM PDT · by NormsRevenge · 26 replies
    BBC News ^ | 5/11/11 | Jason Palmer
    The Crab Nebula has shocked astronomers by emitting an unprecedented blast of gamma rays, the highest-energy light in the Universe. The cause of the 12 April gamma-ray flare, described at the Third Fermi Symposium in Rome, is a total mystery. It seems to have come from a small area of the famous nebula, which is the wreckage from an exploded star. The object has long been considered a steady source of light, but the Fermi telescope hints at greater activity. The gamma-ray emission lasted for some six days, hitting levels 30 times higher than normal and varying at times from...
  • Two respected astronomers go to duel over astronomical event.

    03/09/2011 6:31:10 AM PST · by New Zealender · 14 replies
    In the most important professional astronomy forum two respected astronomers duel over astronomical event. quote ''So you are a chemist and well respected, good that you come here to question my calculations. But instead i have a challenge for you. You are saying that the event will not be visible at Fatima , i say it will be. If i am right and the event is visible then you will admit you incompetence publicly, and i will do the same if its not visible. Do you agree?'' http://cs.astronomy.com/asycs/forums/t/50571.aspx http://cs.astronomy.com/asycs/forums/t/50613.aspx
  • Australian Aborigines 'world's first astronomers'

    09/18/2010 1:58:35 PM PDT · by Fred Nerks · 18 replies · 2+ views
    Yahoo News ^ | Fri Sep 17, 5:39 am ET | U/A
    SYDNEY (AFP) – An Australian study has uncovered signs that the country's ancient Aborigines may have been the world's first stargazers, pre-dating Stonehenge and Egypt's pyramids by thousands of years. Professor Ray Norris said widespread and detailed knowledge of the stars had been passed down through the generations by Aborigines, whose history dates back tens of millennia, in traditional songs and stories. "We know there's lots of stories about the sky: songs, legends, myths," said Norris, an astronomer for Australia's science agency, the Commonwealth Scientific and Research Organization (CSIRO). "We wondered how much further does it go than that. It...
  • Moon is shrinking, say astronomers

    08/19/2010 3:20:01 PM PDT · by NormsRevenge · 24 replies · 1+ views
    AFP on Yahoo ^ | 8/19/10 | AFP
    WASHINGTON (AFP) – The Man in the Moon has become the latest victim of contraction in the housing market. Astronomers reporting on Thursday in the US journal Science said they had found previous undetected landforms which indicate that Earth's satellite has been shrinking... albeit by only a tiny amount. The intriguing features, called lobate scarps, are faults created when the Moon's once-molten interior began to cool, causing the lunar surface to contract and then crinkle, they said. Relative to the Moon's age, estimated at around 4.5 billion years, the contraction is recent, occurring less than a billion years ago, and...
  • The Hertzsprung-Russell Diagram of Astronomers

    07/22/2010 7:32:20 PM PDT · by LibWhacker · 4 replies · 1+ views
  • Astronomers discover most massive stars to date (300 times more massive than the sun)

    07/21/2010 2:04:57 PM PDT · by LibWhacker · 3 replies
    GeoJunk ^ | 7/21/10
    Using a combination of instruments on ESO’s Very Large Telescope, astronomers have discovered the most massive stars to date, one weighing at birth more than 300 times the mass of the Sun, or twice as much as the currently accepted limit of 150 solar masses. The existence of these monsters — millions of times more luminous than the Sun, losing weight through very powerful winds — may provide an answer to the question “how massive can stars be?” A team of astronomers led by Paul Crowther, Professor of Astrophysics at the University of Sheffield, has used ESO’s Very Large Telescope...
  • Sun's Strange Behavior Baffles Astronomers

    06/14/2010 7:43:23 PM PDT · by NormsRevenge · 119 replies · 2,129+ views
    Space.com ^ | 6/14/10 | Denise Chow
    The sun's temper ebbs and flows on what scientists had thought was a pretty predictable cycle, but lately our closest star has been acting up. Typically, a few stormy years would knock out a satellite or two and maybe trip a power grid on Earth. Then a few years of quiet, and then back to the bad behavior. But an extremely long stretch of low activity in recent years has scientists baffled and scrambling for better forecasting models. An expected minimum of solar activity, between 2008 and 2009, was unusually deep. And while the sun would normally ramp up activity...
  • Astronomers find loads of ice on big asteroid

    04/28/2010 10:13:32 AM PDT · by NormsRevenge · 22 replies · 503+ views
    AP on Yahoo ^ | 4/28/10 | AP
    WASHINGTON – Scientists have lots of ice in an unexpected place in our solar system: an asteroid between Mars and Jupiter. The discovery of significant asteroid ice has several consequences. It could help explain how Earth first got its water. It makes asteroids more attractive to explore. And it muddies the definition between comets and asteroids.
  • Astronomers Discover Fog At Titan's South Pole

    12/21/2009 3:08:04 PM PST · by NormsRevenge · 8 replies · 481+ views
    Aside from Earth, Saturn's largest moon, Titan, looks to be the only place in the solar system with copious quantities of liquid (largely, liquid methane and ethane) sitting on its surface. But that's not the only similarity our home and Titan share. A team of planetary astronomers recently announced that the two share yet another feature, which is inextricably linked with that surface liquid: common fog. The team discussed their findings in a recent paper published in The Astrophysical Journal Letters as well as in a presentation at the American Geophysical Union's 2009 Fall Meeting in San Francisco. Astronomers say...
  • XMM-Newton takes astronomers to a black hole’s edge (swallowing equivalent of two Earths per hour)

    05/27/2009 12:26:10 PM PDT · by NormsRevenge · 22 replies · 928+ views
    European Space Agency ^ | 5/27/09 | ESA
    Using new data from ESA’s XMM-Newton spaceborne observatory, astronomers have probed closer than ever to a supermassive black hole lying deep at the core of a distant active galaxy. The galaxy – known as 1H0707-495 – was observed during four 48-hr-long orbits of XMM-Newton around Earth, starting in January 2008. The black hole at its centre was thought to be partially obscured from view by intervening clouds of gas and dust, but these current observations have revealed the innermost depths of the galaxy. “We can now start to map out the region immediately around the black hole,” says Andrew Fabian,...
  • Astronomers Aim to Grasp Mysterious Dark Matter (In search of WIMPs)

    12/29/2008 2:46:01 PM PST · by NormsRevenge · 6 replies · 484+ views
    Space.com on Yahoo ^ | 12/29/08 | Clara Moskowitz
    For the past quarter century, dark matter has been a mystery we've just had to live with. But the time may be getting close when science can finally unveil what this befuddling stuff is that makes up most of the matter in the universe. Dark matter can't be seen. Nobody even knows what it is. But it must be there, because without it galaxies would fly apart. Upcoming experiments on Earth such as the Large Hadron Collider (LHC) particle accelerator in Switzerland, and a new spacecraft called Gaia set to launch in 2011, could be the key to closing the...
  • Astronomers find a planet denser than lead

    10/06/2008 4:12:13 PM PDT · by LibWhacker · 32 replies · 947+ views
    Bad Astronomy ^ | 10/6/08 | Phil Plait
    Planets circle the stars that dot the heavens. Before 1995, we couldn’t have said that with any certainty. Now we know of more than 300 planets orbiting distant stars, and we have a fleet of telescopes looking for them. The ultimate goal is to find another Earth orbiting a star like the Sun, but the quest on the way to that Holy Grail has yielded some strange benchmarks. CoRoT-exo3b, a dense planet orbiting another star COROT-exo-3b compared to Jupiter Meet the planet COROT-exo-3b. It orbits a star slightly larger, hotter, and brighter than the Sun. The star is not an...
  • Astronomers Find a New "Minor Planet" near Neptune

    08/18/2008 12:16:43 PM PDT · by LibWhacker · 24 replies · 234+ views
    Universe Today ^ | 8/18/08 | Nancy Atkinson
    Orbit of solar system object SQ372 (blue) compared with the orbits of Neptune Pluto and Sedna (white, green, red). Credit: N. Kaib. Astronomers announced today that a new "minor planet" with an unusual orbit has been found just two billion miles from Earth, closer than Neptune. Using the Sloan Digital Sky Survey, astronomers detected a small, comet-like object called 2006 SQ372, which is likely made of rock and ice. However, its orbit never brings it close enough to the sun for it to develop a tail. Its unusual orbit is an ellipse that is four times longer than it...
  • Astronomers discover clutch of 'super-Earths'

    06/16/2008 10:57:17 AM PDT · by NormsRevenge · 45 replies · 645+ views
    AFP on Yahoo ^ | 6/16/08 | AFP
    NANTES, France (AFP) - European scientists on Monday said they had located five 'super-Earths', each of them between four and 30 times bigger than our planet, in a trio of distant solar systems. The discovery suggests that at least one third of stars similar to our own Sun host these difficult-to-detect celestial bodies, multiplying previous estimates by five. It also brings astronomers closer to finding planets outside our solar system, called exoplanets, that could potentially duplicate the conditions that gave rise to life on Earth. "In a year or two, it is likely that we will find habitable planets circling...
  • Astronomers re-discover an ignored celestial gem

    06/10/2008 3:03:34 PM PDT · by LibWhacker · 1 replies · 81+ views
    ESA's orbiting X-ray observatory XMM-Newton has re-discovered an ignored celestial gem. The object in question is one of the youngest and brightest supernova remnants in the Milky Way, the corpse of a star that exploded around 1000 years ago. Its shape, age and chemical composition will allow astronomers to better understand the violent ways in which stars end their lives. Exploding stars seed the Universe with heavy chemical elements necessary to build planets and create life. The expanding cloud of debris that each explosion leaves behind, known as a supernova remnant (SNR), is a bright source of X-rays and radio...