Posts Tagged ‘gravity’
Physicists set limit on dark matter mass
BROWN (US) — Physicists have set the strongest limit for the mass of dark matter, the mysterious particles believed to make up nearly a quarter of the universe. Continue…
Tuesday, November 29, 2011 18:10 - 0 Comments
Science & Technology - Nov 10, 2011 11:48 - 0 Comments
Dwarf galaxies put dark matter to the test
U. MICHIGAN (US) — Two satellite dwarf galaxies found 1.1 million and 600,000 light years from Andromeda, the closest spiral galaxy to Earth, may help reveal the nature of dark matter. (more…)
Science & Technology - May 6, 2011 14:42 - 1 Comment
Gravity probe gives props to Einstein
STANFORD (US) — One of NASA’s longest-running projects comes to a close, confirming two predictions of Albert Einstein’s general theory of relativity. (more…)
Top Stories - Apr 12, 2011 10:02 - 0 Comments
Black hole smash-ups eject ‘doughnuts’
CALTECH / CORNELL (US) — Physicists now have a way to visualize how space and time warp when black holes slam into each other. (more…)
Science & Technology - Jul 29, 2010 11:08 - 5 Comments
Alien planets dance around dying star
CALTECH/U. FLORIDA (US)—While most extrasolar planets orbit too far from one another to feel each other’s gravity, researchers have found two systems with pairs of gas giant planets locked in an orbital embrace. (more…)
Science & Technology - Jul 26, 2010 11:45 - 1 Comment
Fast stars fueled by black hole
U. MICHIGAN (US)—The black hole at the center of the galaxy is to blame for sling-shotting “hypervelocity stars” out of the Milky Way at up to 1.8 million miles per hour, new research suggests. (more…)
Science & Technology - Jul 21, 2010 10:13 - 1 Comment
Quasar magnifies far-off galaxy
CALTECH (US)—Astronomers have discovered the first known case of a distant galaxy being magnified by a quasar acting as a gravitational lens. (more…)
Science & Technology - May 26, 2010 12:58 - 0 Comments
Wacky planetary system hints to violent past
U. TEXAS-AUSTIN (US)—Researchers have reported the discovery of a planetary system “out of whack,” where the orbits of two planets are at a steep angle to each other. (more…)
Science & Technology - Mar 31, 2010 11:06 - 1 Comment
Smashing success for Big Bang experiment
U. COLORADO (US)—Scientists crashed proton beams together at three and one-half times the highest energy levels ever recorded on March 30 in a quest to discover the physical conditions immediately following the Big Bang. (more…)
Science & Technology - Mar 16, 2010 11:36 - 6 Comments
Universe’s age: 13.75 billion years
STANFORD (US)—Using entire galaxies as lenses to look at other galaxies, researchers have a newly precise way to measure the size and age of the universe and how rapidly it is expanding, on a par with other techniques. (more…)
Science & Technology - Mar 10, 2010 17:08 - 0 Comments
Einstein validated on cosmic scale
PRINCETON / UC BERKELEY (US)—An analysis of more than 70,000 galaxies demonstrates that the universe—at least up to a distance of 3.5 billion light years from Earth—plays by the rules set out 95 years ago by Albert Einstein in his General Theory of Relativity. (more…)
Science & Technology - Mar 9, 2010 18:22 - 2 Comments
These two dwarfs orbit close and quick
U. WARWICK (UK)—The stars in HM Cancri, the smallest known binary, revolve around each other in just 5.4 minutes—the shortest known orbital period for any binary. (more…)
Science & Technology - Feb 22, 2010 18:08 - 0 Comments
Skiers go down, moguls migrate up
U. COLORADO (US)—Gravity always wins, one might think. Avalanches roar and skiers plunge inexorably downhill. But moguls—or bumps, as skiers know them—move uphill. (more…)
Science & Technology - Feb 10, 2010 10:19 - 0 Comments
Caterpillars ‘lost’ in space without gravity
U. KANSAS (US)—A recent trip into low-Earth orbit has shown just how much monarch butterflies depend on gravity. (more…)
Earth & Environment - Feb 2, 2010 23:30 - 4 Comments
California’s troubled waters
UC IRVINE (US)—Space observations reveal that since October 2003, the aquifers for California’s primary agricultural region—the Central Valley—and its major mountain water source—the Sierra Nevada—have lost nearly enough water combined to fill Lake Mead, America’s largest reservoir. (more…)
Society & Culture - Oct 30, 2009 5:47 - 2 Comments
Race ends in dead heat; Einstein wins
STANFORD (US)—Racing across the universe for the last 7.3 billion years, two gamma-ray photons arrived at NASA’s orbiting Fermi Gamma-ray Space Telescope within nine-tenths of a second of one another. The dead-heat finish may stoke the fires of debate among physicists over Einstein’s special theory of relativity because one of the photons possessed a million times more energy than the other. (more…)
Science & Technology - Oct 21, 2009 17:05 - 3 Comments
Playing hide and seek with exoplanets
U. COLORADO (US)—A precise “laser ruler” is being developed to look for Earth-like planets around other stars. The device will measure tiny changes in infrared light caused by the gravitational wobble of small, cool stars as they are tugged back and forth by their rocky planets. (more…)
Science & Technology - May 19, 2009 11:48 - 0 Comments
Catching gravity waves from the big bang
QUIET team members display circuitry and components developed for the detection of gravity waves: physics graduate students Immanuel Buder and Alison Brizius (front row); Colin Bischoff, physics graduate student; David Moore, undergraduate in physics; Akito Kusaka, postdoctoral fellow in the Kavli Institute for Cosmological Physics; and Bruce Winstein, the Samuel K. Allison Distinguished Service Professor in Physics (back row, l-r). (Credit:Lloyd DeGrane)
Science & Technology - Apr 29, 2009 15:52 - 1 Comment
Missing planets? Signs point to killer stars
U. WASHINGTON (US)—Astronomers during the past two decades have found hundreds of planets orbiting stars outside our solar system. They might have found more, except some of the planets appear to be missing. New research suggests stars—and their gravitational tug—may be to blame. (more…)
