(Phys.org)—While hypothesized dark energy can explain observations of the universe expanding at an accelerating rate, the specific properties of dark energy are still an enigma. Scientists think that dark energy could take ...
Nov 12, 2012
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(PhysOrg.com) -- Some scientists call the cosmological constant the "worst prediction of physics." And when today’s theories give an estimated value that is about 120 orders of magnitude larger than the ...
Mar 05, 2012
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(PhysOrg.com) -- "In many ways, the standard model of cosmology works very well," Jose Cembranos tells PhysOrg. "However, there are very basic features that we just do not know. We have dark energy and dark matter. They d ...
Apr 20, 2009
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(Phys.org)—Research by University of Arizona astronomy professor Rodger Thompson finds that a popular alternative to Albert Einstein's theory for the acceleration of the expansion of the universe does not ...
Jan 09, 2013
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All observations in astronomy are based on light emitted from stars and galaxies and, according to the general theory of relativity, the light will be affected by gravity. At the same time all interpretations ...
Sep 28, 2011
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(PhysOrg.com) -- Recent data for gas rich galaxies precisely match predictions of a modified theory of gravity know as MOND according to a new analysis by University of Maryland Astronomy Professor Stacy McGaugh. ...
Feb 23, 2011
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(PhysOrg.com) -- Researchers describe how to carry out the first experimental test of string theory in a paper published tomorrow in Physical Review Letters.
Sep 01, 2010
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(PhysOrg.com) -- Two new and independent studies have put Einstein's General Theory of Relativity to the test like never before. These results, made using NASA's Chandra X-ray Observatory, show Einstein's ...
Apr 14, 2010
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(Phys.org) -- The NASA/ESA Hubble Space Telescope has captured this view of the dwarf galaxy UGC 5497, which looks a bit like salt sprinkled on black velvet in this image.
Jun 17, 2012
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Sometimes a scientist can only laugh in the face of a seemingly insurmountable challenge.
Feb 13, 2012
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If you want to get your mind around the research that won three astronomers the Nobel Prize in physics last week, it helps to think of the universe as a lump of dough - raisin-bread dough, to be precise - mixed, kneaded and ...
Oct 14, 2011
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(PhysOrg.com) -- One trillion years from now, an alien astronomer in our galaxy will have a difficult time figuring out how the universe began. They won't have the evidence that we enjoy today.
Apr 14, 2011
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In a darkened room in Jerusalem, the world was given a rare glimpse Sunday into the mind of Albert Einstein as he worked to unlock the secrets of the universe.
Mar 07, 2010
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(PhysOrg.com) -- Astronomers have tracked down a gigantic, previously unknown assembly of galaxies located almost seven billion light-years away from us. The discovery, made possible by combining two of the ...
Nov 03, 2009
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Scientists have found new evidence that an idea Albert Einstein regretted ever having may be key to solving a big mystery: why the universe is expanding at an ever-faster clip.
Nov 24, 2010
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