Posts Tagged ‘stars’
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…)
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 - Sep 30, 2009 12:41 - 1 Comment
‘Beautiful’ stellar jet recreated in lab
U. ROCHESTER (US)—Certain stars stream vast amounts of matter into space, creating some of the most beautiful—and inexplicable—objects in the universe. Now, astrophysicists have replicated the physics of a stellar jet in a laboratory. (more…)
Science & Technology - Aug 7, 2009 4:00 - 1 Comment
Stars in early galaxies zoom, zoom, zoom
“We do find stars with comparable speeds in mature galaxies in today’s nearby universe, but those galaxies are typically many tens of thousands of light years across,” says lead researcher Pieter van Dokkum. “Here we have a very small galaxy in the young universe whose stars behave as if they were in a giant galaxy.” (Credit: NASA, ESA, and A. Field/STScI)
Science & Technology - Jul 29, 2009 14:35 - 0 Comments
Rare ‘Green Pea’ galaxies crank out stars
The Green Peas stuck out because of their small size and green color compared to the more common galaxies—such as the one on bottom right. (Courtesy: Carolin Cardamone and Sloan Digital Sky Survey.)
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 - Jun 10, 2009 6:00 - 1 Comment
Photos capture debris from galactic collisions
STONY BROOK (US)—An international team of astronomers has found and photographed enormous fields of debris floating in deep space—remnants of violent galactic collisions that took place hundreds of millions of years ago. (more…)
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.
