Keyword: astrophysics

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  • Problems with the Big Bang Expanding Universe Theory

    05/02/2014 2:52:50 PM PDT · by aimhigh · 22 replies
    Nextbigfuture.com ^ | 05/01/2014 | Next Big Future
    In a startling challenge to the widely-popular Big Bang theory, new evidence, to be published this week in the International Journal of Modern Physics, D, indicates that the universe is not expanding after all. . . .Key contradicted predictions:1)Lithium Prediction: Any superhot explosion throughout the universe, like the Big Bang, would have generated a certain small amount of the light element lithium. Evidence: Yet as astronomers have observed older and older stars, the amount of lithium observed has gotten less and less, and, in the oldest stars is less than one tenth of the predicted level. . . 2) Dark...
  • Physicists suggest possible existence of other kinds of dark matter

    05/26/2013 4:08:21 PM PDT · by neverdem · 51 replies
    Phys.org ^ | May 24, 2013 | Bob Yirka
    Credit: Phys. Rev. Lett. 110, 211302 (2013) (Phys.org) —A team of Harvard University physicists has proposed the possible existence of a type of dark matter not described by current physics models. In their paper published in the journal Physical Review Letters, the team suggests it's possible that not all dark matter is cold and collision-less. In the visible universe, galaxies form into a disk shape—the Milky Way is a good example. All of its members align roughly along a single plane, this due to the forces of gravity and spin. Objects form into masses which, over time, spread out...
  • Harry Kroto: From light years to nanometres – and back

    03/21/2013 7:45:27 PM PDT · by neverdem · 7 replies
    Chemistry World ^ | 21 March 2013 | Neil Withers
    Can you give us a sneak preview of your Pittcon plenary lecture ‘Exameter objects to nanometer ones and back again’?What I want to emphasise in this lecture is that the discovery of C60 started off from an interest in massive clouds of gas in interstellar space – some of them are 100 light years across. The chemistry in those clouds is quite fascinating and, in some parts of them, you find carbon is rather abundant. I thought that this carbon was coming out of stars and my interest led to the experiments that uncovered C60. That prompted conjectures about whether...
  • New Chemical Reaction Could Explain How Stars Form, Evolve, and Eventually Die

    12/08/2012 8:44:00 PM PST · by neverdem · 16 replies
    ScienceDaily ^ | December 7, 2012 | NA
    University of North Dakota scientist Mark Hoffmann's version of Star Search goes a long way -- a very long way -- out into the universe. Hoffmann, a computational chemist, and his colleagues Tryve Helgaker, a well-known Norwegian scientist, and co-authors E.I. Tellgren and K. Lange, also working in Norway, have discovered a molecular-level interaction that science had puzzled over for decades but had never seen. That discovery, it turns out, may redefine how science views chemical compound formation. It also answers questions about what goes on in places like white dwarfs, the super dense cores of stars nearing the end...
  • Has Dark Matter Gone Missing?

    04/19/2012 9:54:03 PM PDT · by neverdem · 41 replies
    ScienceNOW ^ | 19 April 2012 | Adrian Cho
    Enlarge Image Home sweet home. In the vicinity of the sun, our Milky Way galaxy seems to contain no dark matter, one team of astronomers claims. Credit: Serge Brunier/NASA If a new study is true, then the search for dark matter just got a lot weirder. Our little corner of the Milky Way contains no observable concentration of the mysterious stuff whose gravity binds the galaxy, claims one team of astronomers. That finding would present a major problem for models of how galaxies form and may undermine the whole notion of dark matter, the researchers claim. But some scientists...
  • A star explodes and turns inside out

    04/04/2012 10:34:51 PM PDT · by U-238 · 10 replies
    Astronomy Magazine ^ | 3/4/2012 | Chandra X-ray Center
    A new X-ray study of the remains of an exploded star indicates that the supernova that disrupted the massive star may have turned it inside out in the process. Using long observations of Cassiopeia A (Cas A), a team of scientists has mapped the distribution elements in the supernova remnant in unprecedented detail. This information shows where the different layers of the pre-supernova star are located 300 years after the explosion, and provides insight into the nature of the supernova. The artist’s illustration shows a simplified picture of the inner layers of the star that formed Cas A just before...
  • How black holes grow

    04/03/2012 11:31:22 PM PDT · by U-238 · 19 replies
    Astronomy Magazine ^ | 3/3/2012 | University of Utah, Salt Lake City
    A study led by a University of Utah astrophysicist found a new explanation for the growth of supermassive black holes in the center of most galaxies: They repeatedly capture and swallow single stars from pairs of stars that wander too close. Using new calculations and previous observations of our Milky Way and other galaxies, “We found black holes grow enormously as a result of sucking in captured binary star partners,” said Ben Bromley from the University of Utah in Salt Lake City. “I believe this has got to be the dominant method for growing supermassive black holes,” he said. “There...
  • New data support Einstein on accelerating universe

    04/03/2012 1:00:38 AM PDT · by U-238 · 59 replies
    Science News ^ | 2/2/2012 | Elizabeth Quill
    Einstein is still the boss, say researchers with the BOSS project for measuring key properties of the universe. BOSS, for Baryon Oscillation Spectroscopic Survey, has measured the distance to faraway galaxies more precisely than ever before, mapping the universe as it existed roughly 6 billion years ago, when it was only 63 percent of its current size. The findings suggest that the mysterious “dark energy” causing the universe to expand at an accelerating rate was foreseen by Einstein, the researchers reported April 1 at the American Physical Society meeting. To keep the universe in a static state, Einstein added a...
  • German astronomers have discovered an ancient planetary system dating from 13 billion years ago

    03/30/2012 6:30:02 PM PDT · by U-238 · 37 replies
    Balkans.com ^ | 3/30/2012 | Balkans.com
    German astronomers have discovered an ancient planetary system thought to be a survivor of one of the earliest cosmic eras, from 13 billion years ago. The system consists of the star HIP 11952 and two planets. Such an old system will help shed light on planet formation in the early Universe, which occurred under conditions quite different from those of later planetary systems such as our own. Accepted planetary theory states that, generally speaking, a star that contains more 'metals', (i.e. chemical elements other than hydrogen and helium) is more likely to have planets; it is also widely accepted that...
  • Physicists find patterns in new state of matter

    03/29/2012 4:45:02 PM PDT · by U-238 · 20 replies
    Physorg.com ^ | 3/29/2012 | Physorg.com
    In a paper published in the March 29 issue of the journal Nature, the scientists describe the emergence of “spontaneous coherence,” “spin textures” and “phase singularities” when excitons—the bound pairs of electrons and holes that determine the optical properties of semiconductors and enable them to function as novel optoelectronic devices—are cooled to near absolute zero. This cooling leads to the spontaneous production of a new coherent state of matter which the physicists were finally able to measure in great detail in their basement laboratory at UC San Diego at a temperature of only one-tenth of a degree above absolute zero....
  • Pulsars: The universe's gift to physics

    03/28/2012 8:26:40 PM PDT · by U-238 · 13 replies
    Astronomy Magazine ^ | 2/20/2012 | NRAO
    Pulsars, superdense neutron stars, are perhaps the most extraordinary physics laboratories in the universe. Research on these extreme and exotic objects already has produced two Nobel Prizes. Pulsar researchers now are poised to learn otherwise-unavailable details of nuclear physics to test general relativity in conditions of extremely strong gravity, and to directly detect gravitational waves with a “telescope” nearly the size of our galaxy. Neutron stars are the remnants of massive stars that exploded as supernovae. They pack more than the mass of the Sun into a sphere no larger than a medium-sized city, making them the densest objects in...
  • The Moon’s Long Lost Twin Found

    03/24/2012 12:57:47 AM PDT · by U-238 · 79 replies · 2+ views
    International Business Times ^ | 8/11/2011 | International Business Times
    The moon maybe palely alone in the night sky today but according to scientists it is possible that the there was a second, smaller moon 4.4 billion years ago. A paper published in the journal Nature theorized that there was a smaller moon created in the same impact that created the moon. Astronomers, Martin Jutzi and Erik Asphaug of the University of California at Santa Cruz have long wondered why the moon had two incongruous sides, one smooth with flat plains and another side full of rugged mountains and craters. The astronomers started thinking that the mountainous region had been...
  • How Many Unbound Planets in Milky Way?

    03/23/2012 8:43:25 PM PDT · by U-238 · 21 replies · 4+ views
    Sky and Telescopeha ^ | 2/29/2012 | Monica Young
    Life as we know it exists on a cozy planet in a stable orbit around a sun shining brightly in its sky. But a new study hints that the most common life in the universe might exist deep inside eternal-night worlds far from any star, adrift in the icy dark of interstellar space. Researchers at the Kavli Institute for Particle Astrophysics and Cosmology (KIPAC) at Stanford University estimate that "nomad" planets, ejected from their home stellar system and now free-floating through the Milky Way, could outnumber stars by as many as 100,000 to 1. Earlier estimates were more like a...
  • 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,...
  • Scientists tell of 'runaway' planets

    03/22/2012 11:14:22 PM PDT · by U-238 · 27 replies · 2+ views
    UPI ^ | March 22, 2012 | UPI
    U.S. scientists studying "runaway" stars tossed out of our galaxy at great velocities say they've confirmed the same thing can happen to planets. The first runaway star was discovered seven years ago, heading out of the Milky Way at 1.5 million mph, and new research says planets must be doing the same thing -- at speeds up to 30 million mph, the Harvard-Smithsonian Center for Astrophysics reported Thursday. "These warp-speed planets would be some of the fastest objects in our galaxy," astrophysicist Avi Loeb said. "If you lived on one of them, you'd be in for a wild ride from...
  • Retest of neutrino speed suggests Einstein was right, after all

    03/19/2012 4:22:37 PM PDT · by U-238 · 16 replies · 1+ views
    Christian Science Monitor ^ | 3/19/2012 | By Clara Moskowi
    Six months after physicists shocked the world by announcing they'd found particles seemingly traveling faster than light, the growing scientific consensus seems to be that the results were flawed. Neutrinos are the vampires of physics. Researchers at the ICARUS project in Italy have recreated an independent version of the original Switzerland-based experiment, called OPERA, and found that their particles traveled at a respectable, sub-light speed. Though the results don't automatically disprove OPERA's findings, they add to most scientists' sense that the shocking finding was an anomaly "The evidence is beginning to point towards the OPERA result being an artifact of...
  • Smooth Sailing on Titan

    03/18/2012 12:25:55 AM PDT · by U-238 · 16 replies
    Sky and Telescope ^ | 3/14/2012 | Sky and Telescope
    Lakes on Saturn’s moon Titan don’t do the wave very well. Radar images from NASA’s Cassini spacecraft show glassy smooth surfaces, even on bodies like Ligeia Mare, a large sea roughly 400 kilometers (250 miles) wide. There are patterns on the shoreline of the southern hemisphere's Ontario Lacus that might be from waves, but the features aren’t definitive. Winds haven’t been too high on Titan since Cassini first arrived in Saturn's system in 2004, so the lack of waves is odd but understandable. The ESA’s Huygens probe sent back amazing surface images, including snapshots of delta-looking features, when it made...
  • Here's One Reason The Moon's Gravity Is So Important To The Military

    03/17/2012 8:30:25 PM PDT · by U-238 · 35 replies · 1+ views
    Business insider ^ | 3/16/2012 | Eloise Lee
    When you're building one of the world's most advanced jet fighters, there's no room for error. Engineering technology used by BAE Systems, a partner in the F-35 joint strike fighter program and the manufacturer of Typhoons, even takes the moon's gravitational pull into account. The moon causes the ground to shift by one to two millimeters every time it pulls the oceans' tides in and out. And this tiny movement can throw off the precise alignment of an aircraft's frame as pieces are put together. "That might not sound a lot, but given the tolerances we are working to on...
  • The Lost Siblings of the Sun

    03/12/2012 3:32:13 PM PDT · by U-238 · 28 replies · 1+ views
    Sky and Telescope ^ | 3/10/2009 | Alan MacRobert
    Most stars are born in clusters rather than singly, and there’s plenty of evidence that the Sun was too. For one thing, the material of the infant solar system (as preserved in the earliest meteorites) was enriched by fresh supernova debris from at least one very young, massive star (having 15 to 25 solar masses) that exploded less than 5 light-years away, no more than 2 million years after the Sun's formation. Today no such massive star exists within 300 light-years of the Sun. Clearly, the early solar system had stars close around it. But that was 4.57 billion years...
  • Loose cable blamed for speedy neutrinos

    03/06/2012 1:16:25 AM PST · by U-238 · 41 replies
    Science News ^ | 2/23/2012 | Devin Powell
    Faulty wiring has been proposed as the glitch that caused a European physics experiment to clock particles flying faster than light. Scientists at Italy’s OPERA experiment reported in September that nearly weightless particles called neutrinos were apparently traveling from the CERN laboratory on the Swiss-French border to an underground detector in Italy, 730 kilometers away, faster than the speed of light. The apparent violation of Einstein’s theory of special relativity immediately produced a chorus of theorists offering reasons why neutrinos simply could not be going that fast (SN: 11/5/11, p. 10). “It was always clear to me that the results...
  • Water not so squishy under pressure

    03/06/2012 1:09:39 AM PST · by U-238 · 11 replies
    Science News ^ | 3/5/2012 | Nadia Drake
    When squeezed to pressures and temperatures like those inside giant planets, water molecules are less squeezable than anticipated, defying a set of decades-old equations used to describe watery behavior over a range of conditions. Studying how molecules behave in such environments will help scientists better understand the formation and composition of ice giants like Uranus and Neptune, as well as those being spotted in swarms by planet hunters. The new work, which appears in the March 2 Physical Review Letters, also suggests that textbooks about planetary interiors and magnetic fields may need reworking. “At this point, it’s worth putting together...
  • Diet of a dying star

    03/06/2012 1:06:23 AM PST · by U-238 · 11 replies
    Science News ^ | 2/11/2012 | Nadia Drake
    Scientists are beginning to sort out the stellar ingredients that produce a type 1a supernova, a type of cosmic explosion that has been used to measure the universe’s accelerating expansion. Two teams of researchers presented new data about these supernovas at the American Astronomical Society meeting on January 11. One team confirmed a long-held suspicion about the kind of star that explodes, and the second provided new evidence for what feeds that star until it bursts. “This is a confirmation of a decades-old belief, namely that a type 1a supernova comes from the explosion of a carbon-oxygen white dwarf,” said...
  • Antimatter Belt Found Circling Earth

    08/12/2011 12:24:36 AM PDT · by neverdem · 29 replies
    ScienceNow ^ | 9 August 2011 | Ron Cowen
    Enlarge Image Antimatter reservoir. A newly discovered belt of antiprotons lies within the innermost portion (pink) of Earth's magnetosphere, the large bubblelike region interior to the blue arc that is controlled by the planet's magnetic field. Credit: Aaron Kaase/NASA/Goddard A newly discovered belt of antimatter circling Earth could be an astronaut's best friend. The belt, which consists of antiprotons trapped by Earth's magnetic field several hundred kilometers above the planet's surface, may ultimately become a key source of fuel for missions venturing beyond the solar system. Researchers analyzing data from the PAMELA (Payload for Antimatter/Matter Exploration and Light-nuclei Astrophysics)...
  • New candidate for most distant object in universe

    05/25/2011 11:58:54 AM PDT · by Red Badger · 47 replies
    www.physorg.com ^ | 05-25-2011 | Provided by Pennsylvania State University
    A gamma-ray burst detected by NASA's Swift satellite in April 2009 has been newly unveiled as a candidate for the most distant object in the universe. At an estimated distance of 13.14 billion light years, the burst lies far beyond any known quasar and could be more distant than any previously known galaxy or gamma-ray burst. Multiple lines of evidence in favor of a record-breaking distance for this burst, known as GRB 090429B for the 29 April 2009 date when it was discovered, are presented in a paper by an international team of astronomers led by former Penn State University...
  • Betelgeuse 'not likely to explode in 2012'

    01/22/2011 8:58:26 PM PST · by Red Badger · 96 replies · 1+ views
    News.com.australia ^ | 01-22-201 | Staff
    THE super-giant red star Betelgeuse in the constellation of Orion is destined to explode, but maybe not next year as some recent news reports have suggested and will not be as bright as some predicted FoxNews.com reported Betelgeuse has already become a red giant, which indicates it wil explode and become a supernova. But experts say it is not likely to happen soon and it will happen far enough away that it wil not hurt Earth US astronomer Phil Plait noted on his blog that a supernova would have to be no farther than 25 light years away to "fry...
  • Hyperfast Star Was Booted from Milky Way

    01/19/2011 5:30:39 PM PST · by ErnstStavroBlofeld · 55 replies
    ScienceDaily ^ | 7/22/2010 | ScienceDaily
    A hundred million years ago, a triple-star system was traveling through the bustling center of our Milky Way galaxy when it made a life-changing misstep. The trio wandered too close to the galaxy's giant black hole, which captured one of the stars and hurled the other two out of the Milky Way. Adding to the stellar game of musical chairs, the two outbound stars merged to form a super-hot, blue star. This story may seem like science fiction, but astronomers using NASA's Hubble Space Telescope say it is the most likely scenario for a so-called hypervelocity star, known as HE...
  • The Pioneer Anomaly, a 30-Year-Old Cosmic Mystery, May Be Resolved At Last

    12/16/2010 10:38:08 PM PST · by ErnstStavroBlofeld · 35 replies
    Popular Science ^ | 12/15/2010 | Natalie Wolchover
    Thirty years ago, NASA scientists noticed that two of their spacecraft, Pioneer 10 and Pioneer 11, were veering off course slightly, as if subject to a mysterious, unknown force. In 1998, the wider scientific community got wind of that veering—termed the Pioneer anomaly—and took aim at it with incessant, mind-blowingly detailed scrutiny that has since raised it to the physics equivalent of cult status. Now, though, after spawning close to 1000 academic papers, numerous international conferences, and many entire scientific careers, this beloved cosmic mystery may be on its way out. Slava Turyshev, a scientist at the Jet Propulsion Laboratory...
  • Who says the Sun controls our weather and climate? An interview with astrophysicist Piers Corbyn

    08/04/2010 2:38:40 PM PDT · by Vincent Jappi · 24 replies
    Environmental Policy Examiner ^ | August 1, 2010 | Kirtland Griffin
    When I think of all the evidence I have been presented with over the past several years regarding the main driver of our climate, one man stands tall. That would be Piers Corbyn, founder of WeatherAction.com in the UK. He does long range weather and climate predictions and his accuracy is amazing, especially for the extreme events all based on the Sun. I had seen his forecasts on the web but I had my first chance to talk with him in person at the 2008 International Conference on Climate Change in New York put on by the Heartland Institute. It...
  • Planet Found With Comet-like Tail

    07/21/2010 5:56:31 AM PDT · by NYer · 12 replies
    Nat Geo ^ | July 15, 2010
    HD 209458b, shown in red in an artist's conception, is the first confirmed "cometary planet," experts say. Image courtesy G. Bacon, NASA/ESAAn alien planet orbits so close to its star that its atmosphere is being blasted away, forming a gaseous, comet-like tail, astronomers announced Thursday. (Related: "Odd Star Sheds Comet-like Tail.") About 153 light-years from Earth, planet HD 209458b hugs its star so tightly that the planet's atmosphere is likely a scorching 2,000 degrees Fahrenheit (1,093 degrees Celsius) an a year passes in just 3.5 days—making Mercury's 88-day orbit seem downright leisurely.That tight orbit also means this gas giant—meaning...
  • Star Keeps Magnetic Lock on Its Big Brother

    01/18/2010 9:08:18 AM PST · by neverdem · 8 replies · 512+ views
    ScienceNOW Daily News ^ | 14 January 2010 | Phil Berardelli
    Enlarge ImageMutual attraction. The binary Algol stars share a powerful, permanent magnetic field.Credit: W. Peterson et al./NRAO/AUI/NSF Taking advantage of an unusual pair of nearby stars, astronomers have for the first time captured images of a magnetic field generated by a star other than our sun. Studying that field should help researchers gain a much better understanding of the internal dynamics that produce stellar magnetic fields, which in our sun's case can influence everything from climate to satellite orbits to telecommunications. Astronomers have indirectly detected magnetic activity associated with other stars. But because of the great distances and the...
  • Astronomers witness biggest star explosion

    12/03/2009 8:42:57 PM PST · by neverdem · 14 replies · 1,100+ views
    Nature News ^ | 2 December 2009 | Geoff Brumfiel
    Massive supernova produced rainbow of elements for months. Bang! The collapse of a massive star created a previously unseen type of supernova.NASA Astronomers have watched the violent death of what was probably the most massive star ever detected. The supernova explosion, which lasted for months, is thought to have generated more than 50 Suns' worth (1032 kilograms) of different elements, which may one day go on to make new solar systems. The explosion — dubbed SN2007bi — was spotted as part of a digital survey to hunt for supernovae at the Palomar Observatory near San Diego, California. One supernova in...
  • Beauty from the Bottom of the Universe (astrophysicist speaks on faith and science)

    10/08/2009 10:23:40 AM PDT · by NYer · 19 replies · 893+ views
    Headline Bistro ^ | October 8, 2009 | Elizabeth Hansen
    Ancient radiation, the birth of the universe and the future of the galaxies around us: for Marco Bersanelli, a professor of astrophysics at the University of Milan, such mysteries are all in a day’s work.For the past 17 years Bersanelli has been a member of the science team of Europe’s recently launched Planck observatory, a telescope currently orbiting the sun 1.5 million kilometers from Earth in a mission to map traces of radiation left over from the Big Bang 14 billion years ago. Essentially, Planck is grabbing images of the universe’s earliest light and, hopefully, clues as to how the...
  • New astrophysical discoveries leave little to no room for Atheism, expert says

    09/30/2009 6:47:54 PM PDT · by markomalley · 54 replies · 2,267+ views
    CNA ^ | 9/30/2009
    Denver, Colo., Sep 30, 2009 / 03:35 pm (CNA).- Contemporary astrophysics hold the scientific key to prove the existence of God, but unfortunately very few know the scientific facts, said Fr. Robert J. Spitzer, S.J, PhD, during a conference delivered on Sunday at the John Paul II Center for the New Evangelization in Denver, Colorado. The Honolulu-born Jesuit is the past president of Gonzaga University and is also well-known philosopher and physicist who is involved in bringing science and theology together. Fr. Spitzer is currently engaged in an ambitious project to explain the metaphysical consequences of the latest astrophysical discoveries,...
  • The Biblical roots of modern science

    09/29/2009 8:09:53 AM PDT · by GodGunsGuts · 9 replies · 809+ views
    CMI ^ | September 29, 2009 | Jonathan Sarfati, Ph.D.
    Many atheopaths1 and their compromising churchian allies claim that biblical belief and science are mortal enemies. Yet historians of science, even non-Christians, have pointed out that modern science first flourished under a Christian world view while it was stillborn in other cultures such as ancient Greece, China and Arabia. The historical basis of modern science depended on the assumption that the universe was made by a rational Creator. An orderly universe makes perfect sense only if it were made by an orderly Creator (cf. 1 Corinthians 14:33). For example, evolutionary anthropologist and science writer Loren Eiseley stated:...
  • Gravity waves 'around the corner'

    08/22/2009 10:05:51 PM PDT · by neverdem · 70 replies · 1,734+ views
    Nature News ^ | 19 August 2009 | Calla Cofield
    Sensitive search fails to find ripples in space, but boosts hopes for future hunts.Supernovas, such as the one which created the Crab Nebula, should send out bursts of gravity waves.NASA The hunt for gravitational waves may not have found the elusive ripples in space-time predicted by Albert Einstein, but the latest results from the most sensitive survey to date are providing clear insight into the origins and fabric of the Universe.General relativity predicts that gravitational waves are generated by accelerating masses. Violent yet rare events, such as a supernova explosion or the collision of two black holes, should make the...
  • Glimpse of Earth as seen from afar - Lunar eclipse paints portrait of Earth that could aid...

    06/11/2009 11:19:55 PM PDT · by neverdem · 28 replies · 1,589+ views
    Nature News ^ | 10 June 2009 | Eric Hand
    Lunar eclipse paints portrait of Earth that could aid hunt for distant habitable planets.The rosy glow of a lunar eclipse helped astronomers capture the Earth's transmission spectrum.Daniel Lopez Astronomers have seen what the Earth's atmosphere might look like from outer space by using the Moon as a giant mirror. Sunlight that bounced back from the Moon carried a fingerprint of the Earth's atmosphere that could help astronomers determine if the extrasolar planets they're finding harbour life.The astronomers, at Spain's Institute of Astrophysics of the Canary Islands, made their observations on 16 August 2008 during a lunar eclipse — in which...
  • First supernovae blew early galaxies apart

    06/04/2009 3:07:32 PM PDT · by Fred Nerks · 14 replies · 589+ views
    Cosmos Online ^ | 3 June 2009 | 2009by Heather Catchpole
    SYDNEY: The universe's first stars blew small galaxies apart when they exploded, effectively quashing all nearby star formation, say Japanese astrophysicists. The theory, based on analytical calculations of the energy and disruptive effects of early supernovae, adds another piece to the puzzle of what the first stars were like and how they influenced galaxy formation. The first stars formed around 200 million years after the Big Bang in clumps of dark matter called dark matter haloes – the basic building blocks of galaxies. Running out of gas These stars were massive, probably 10 to 100 times bigger than the Sun....
  • Dark matter intrigue deepens - Space telescope may have glimpsed hint of mystery particles.

    05/08/2009 12:58:54 AM PDT · by neverdem · 8 replies · 1,088+ views
    Nature News ^ | 5 May 2009 | Eric Hand
    New data from two experiments -- one in space, one on a balloon floating above Antarctica -- hint at a tantalizing detection of dark matter, the mysterious stuff comprising 85% of the universe's matter. The evidence is a reported excess of high-energy electrons and their antimatter counterparts, positrons, which could be created as dark matter particles annihilate or decay. The signal from Fermi, the orbiting gamma-ray telescope, is subtle, whereas that claimed by the balloon-borne Advanced Thin Ionization Calorimeter (ATIC) is much more pronounced. The differences are puzzling, but the findings -- according to some -- could herald the birth...
  • Lights Out for Dark Matter Claim?

    05/05/2009 4:10:40 PM PDT · by neverdem · 37 replies · 1,433+ views
    ScienceNOW Daily News ^ | 2 May 2009 | Adrian Cho
    Enlarge ImageKilljoy. NASA's orbiting Fermi Gamma-ray Space Telescope has not reproduced a previously claimed signature of dark matter. Credit: NASA and General Dynamics Last November, data from a balloon-borne particle detector circling the South Pole revealed a dramatic excess of high-energy particles from space--a possible sign of dark matter, the mysterious substance whose gravity seems to hold our galaxy together. But satellite data reported today stick a pin in that claim. Researchers working with NASA's orbiting Fermi Gamma-ray Space Telescope say they do not see the purported excess. The observations don't disprove the existence of dark matter, but they...
  • A Giant Breach in Earth's Magnetic Field

    12/16/2008 2:11:19 PM PST · by TaraP · 203 replies · 5,747+ views
    NASA ^ | Dec 16th, 2008
    Dec. 16, 2008: NASA's five THEMIS spacecraft have discovered a breach in Earth's magnetic field ten times larger than anything previously thought to exist. Solar wind can flow in through the opening to "load up" the magnetosphere for powerful geomagnetic storms. But the breach itself is not the biggest surprise. Researchers are even more amazed at the strange and unexpected way it forms, overturning long-held ideas of space physics. "At first I didn't believe it," says THEMIS project scientist David Sibeck of the Goddard Space Flight Center. "This finding fundamentally alters our understanding of the solar wind-magnetosphere interaction." The opening...
  • ‘Cosmology is not even astrophysics’ ("biblical big picture is far more believable than...Big Bang")

    12/04/2008 12:25:24 PM PST · by GodGunsGuts · 359 replies · 2,975+ views
    CMI ^ | December 3, 2008 | John G. Hartnett, Ph.D.
    The fact is that the history of the universe cannot be determined from a model which cannot be independently tested. The Big Bang cosmology is verified in the minds of those who already hold to that belief—that the Universe created itself about 14 billion years ago—ex nihilo. To me the biblical big picture is far more believable...
  • Cosmic-ray hot spots puzzle researchers - Proton discovery may cast doubt on dark-matter...

    11/29/2008 1:24:32 PM PST · by neverdem · 17 replies · 942+ views
    Nature News ^ | 26 November 2008 | Philip Ball
    Proton discovery may cast doubt on dark-matter theories. The Milagro detector has seen cosmic-ray hot-spots.Milagro / U. Maryland / LANL Hot on the heels of speculation that cosmic rays may have revealed the signature of elusive dark matter in space, new observations could challenge that idea and reinforce an alternative explanation.A seven-year-long experiment at the Milagro cosmic-ray detector near Los Alamos, New Mexico, has revealed 'bright patches' of high-energy cosmic rays in the sky1 – something incompatible with a dark-matter source.Cosmic rays are charged particles, mostly protons and electrons, that are produced in space and generally have a characteristic energy...
  • Mysterious New 'Dark Flow' Discovered in Space

    09/25/2008 8:58:58 AM PDT · by nobama08 · 18 replies · 755+ views
    foxnews.com ^ | Thursday, September 25, 2008 | Clara Moskowitz
    As if the mysteries of dark matter and dark energy weren't vexing enough, another baffling cosmic puzzle has been discovered. Patches of matter in the universe seem to be moving at very high speeds and in a uniform direction that can't be explained by any of the known gravitational forces in the observable universe. Astronomers are calling the phenomenon "dark flow." The stuff that's pulling this matter must be outside the observable universe, researchers conclude.
  • Physicists discover 'dark flow' motion

    09/25/2008 1:51:17 AM PDT · by Berlin_Freeper · 10 replies · 619+ views
    upi.com ^ | September 24, 2008 | UPI
    Scientists using data from the U.S. space agency's Wilkinson Microwave Anisotropy Probe have identified an unexpected motion in distant galaxy clusters. National Aeronautics and Space Administration researchers say the cause of the motion might be the gravitational attraction of matter that lies beyond the observable universe. "The clusters show a small but measurable velocity that is independent of the universe's expansion and does not change as distances increase," said lead researcher Alexander Kashlinsky at NASA's Goddard Space Flight Center in Greenbelt, Md. "We never expected to find anything like this."
  • Uncommon Earth - Simulation shows the solar system could only form under rare conditions

    08/07/2008 9:57:23 PM PDT · by neverdem · 108 replies · 207+ views
    Science News ^ | August 7th, 2008 | Ashley Yeager
    Goldilocks isn’t the only one who demanded everything to be “just right.” The Earth and its fellow seven planets also needed perfect conditions to form as observed, and those right conditions occur rarely, a new computer simulation shows. The new simulation, described in the Aug. 8 Science, is the first to trace from beginning to end how planetary systems form from an initial gas disk encircling a baby star. “The really striking result of the new model is how chaotic and even violent the average story of a planet’s birth is,” says Edward Thommes, an astrophysicist now at the University...
  • Catholic University professor pioneers lunar telescope-making method

    07/11/2008 1:45:40 PM PDT · by NYer · 13 replies · 228+ views
    CNS ^ | July 10, 2008 | Brandy Wilson
    GREENBELT, Md. (CNS) -- An adjunct professor at The Catholic University of America in Washington has devised a new way to see outer space -- from the moon. Astrophysicist Peter Chen, along with colleagues Michael Van Steenberg, Ronald Oliversen and Douglas Rabin at NASA's Goddard Space Flight Center, has pioneered a method to create giant telescope mirrors on the moon. "We can do something really unique here. We can go to the moon and create a large telescope 20 or 50 meters across. This is far out of anything that exists on earth," said Chen in an interview with Catholic...
  • Where mathematics and astrophysics meet

    06/06/2008 12:26:09 PM PDT · by Red Badger · 23 replies · 123+ views
    www.physorg.com ^ | 05 June 2008 | Source: American Mathematical Society
    Einstein rings produced by a galaxy behind the lensing galaxy. The sources are actually extended and that is why one sometimes sees arcs rather than complete rings. Credit: Photo credit: NASA, ESA, and the SLACS Survey team: A. Bolton (Harvard/Smithsonian), S. Burles (MIT), L. Koopmans (Kapteyn), T. Treu (UCSB), and L. Moustakas (JPL/Caltech) The mathematicians were trying to extend an illustrious result in their field, the Fundamental Theorem of Algebra. The astrophysicists were working on a fundamental problem in their field, the problem of gravitational lensing. That the two groups were in fact working on the same question is...
  • Arguments that Prove that Climate Change is driven by Solar Activity and not by CO2 Emission

    05/26/2008 4:09:08 PM PDT · by Delacon · 45 replies · 228+ views
    Canada Free Press ^ | May 26, 2008 | Dr. Gerhard Löbert
    <p>Conveyor of a super-Einsteinian theory of gravitation that explains, among many other post-Einstein-effects, the Sun-Earth-Connection and the true cause of the global climate changes.</p> <p>As the glaciological and tree ring evidence shows, climate change is a natural phenomenon that has occurred many times in the past, both with the magnitude as well as with the time rate of temperature change that have occurred in the recent decades. The following facts prove that the recent global warming is not man-made but is a natural phenomenon.</p>
  • Dark Understanding of Matter

    03/25/2008 4:53:00 AM PDT · by Renfield · 3 replies · 189+ views
    Thunderbolts.info ^ | 3-25-08 | Stephen Smith
    Images from the Hubble Space Telescope have revealed a so-called "ring of dark matter" circling a galaxy cluster. Does dark matter exist? Or is electricity a better explanation for the structure of the universe? {Galaxy Cluster CL0024+17 with an overlay showing a supposed dark matter ring. Credit: NASA, ESA, M. J. Jee and H. Ford et al. (Johns Hopkins University)} In a recent announcement, NASA and the European Space Agency (ESA) reported the discovery of something in deep space that seems to confirm previously inferred observations of "dark matter." Although "dark matter" cannot be seen or detected by instruments, its...
  • Boffin stacks 16 PS3s to simulate black hole collisions

    03/05/2008 11:40:02 AM PST · by ShadowAce · 28 replies · 181+ views
    The Register ^ | 28 February 2008 | Scott Snowden
    When most of us arrived home with our newly purchased PS3, we couldn't wait to start annihilating aliens in Resistance: Fall of Man or kicking butt kung fu-style in Virtua Fighter 5. Not astrophysicist Gaurav Khanna - he used his to build a supercomputer. Khanna now owns a total of 16 PS3 consoles, all linked together to provide the same computing power as a 400-node supercomputer. His set up, which he calls a 'gravity grid', is used to simulate the activity of very large black holes for the Physics Department at the University of Massachusetts. Stacked Sonies: the 'gravity grid'...