Posts Tagged ‘cosmology’
Science & Technology - Jun 14, 2010 11:01 - 0 Comments
First look deep inside infant solar systems
U. ARIZONA (US)—Astronomers have observed in unprecedented detail the processes giving rise to stars and planets in nascent solar systems. (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 - Feb 3, 2010 12:55 - 0 Comments
Simulated galaxies resemble real ones
WASHINGTON (US)—Using millions of hours on supercomputers, researchers have run simulations of galaxy formation and produced dwarf galaxies very much like those observed today by satellites and large telescopes around the world. (more…)
Science & Technology - Jan 13, 2010 10:58 - 5 Comments
So, why is the Milky Way a barred spiral?
CALTECH (US)—For the first time, two astronomers have explained the diversity of galaxy shapes seen in the universe. (more…)
Science & Technology - Nov 2, 2009 23:27 - 0 Comments
Starburst galaxy emits intense gamma rays
IOWA STATE (US)—A galaxy quickly creating new stars is also a source of high energy gamma rays, according to a recent discovery. Gamma rays are high energy electromagnetic radiation. The rays discovered have a trillion times the energy of visible light. (more…)
Earth & Environment - Oct 30, 2009 10:38 - 0 Comments
First detailed record of tsunami erosion
U. WASHINGTON (US)—A group of scientists working in the Kuril Islands off the east coast of Russia has documented the scope of tsunami-caused erosion and found that a wave can carry away far more sand and dirt than it deposits. (more…)
Science & Technology - Jul 17, 2009 10:39 - 1 Comment
Twinkle, twinkle: Early stars came in pairs
This computer-simulated image shows the formation of two high density regions (yellow) in the early universe. The cores are expected to evolve into a binary—or ‘twin’—star system. (Courtesy: Ralf Kaehler, Matthew Turk, and Tom Abel)
Science & Technology - Jun 17, 2009 15:00 - 1 Comment
Meteorite suggests younger cosmic roots for Earth
University of Chicago Postdoctoral Scientist Philipp Heck with a sample of the Allende meteorite. The dark portions of the meteorite contain dust grains that formed before the birth of the solar system. The Allenda meteorite is of the same type as the Murchison meteorite, the subject of Heck’s Astrophysical Journal study. (Credit: Dan Dry)
Science & Technology - May 26, 2009 11:06 - 0 Comments
Nature caught ‘recycling’ a star
Researchers have theorized that millisecond pulsars are created in double-star systems when matter from the companion star falls into the pulsar’s gravity well and increases the rotation speed, but until now the process has never been observed directly.
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 - May 11, 2009 11:58 - 0 Comments
Dark energy model suggests frozen universe
VANDERBILT (US)—Imagine a time when the entire universe froze. According to a new model for dark energy, that is essentially what happened about 11.5 billion years ago, when the universe was a quarter of the size it is today. (more…)
Science & Technology - Mar 16, 2009 13:11 - 3 Comments
Cosmic-ray ‘hot spots’ point to mystery source
NYU (US)—Physicists have observed for the first time two distinct “hot spots” that appear to be showering Earth with an excess of cosmic rays. The discovery calls into question nearly a century of understanding about galactic magnetic fields near our solar system, and suggests the possibility that an unknown source or magnetic effect could be responsible. (more…)
