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Latest Astrophysical Journal Stories

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2011-08-18 13:55:05

Using data collected by NASA's STEREO spacecraft, researchers at Southwest Research Institute and the National Solar Observatory have developed the first detailed images of solar wind structures as plasma and other particles from a coronal mass ejection (CME) traveled 93 million miles and impacted Earth. The images from a December 2008 CME event reveal an array of dynamic interactions as the solar wind, traveling at speeds up to a million miles per hour, shifts and changes on its three-day...

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2011-04-19 09:18:11

The hottest stars in the universe spin so fast that they get a bit squished at their poles and dimmer around their middle. The 90-year-old theory that predicts the extent of this "gravity darkening" phenomenon has major flaws, according to a new study led by University of Michigan astronomers. The von Zeipel law, named for its creator, Swedish astronomer Edvard Hugo von Zeipel, has been used for the better part of a century to predict the difference in surface gravity, brightness and...

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2011-01-05 07:50:00

What happens when galaxies crash together? For years, these cosmic collisions have been blamed for triggering violent outbursts at the hearts of galaxies. Now, a remarkable piece of detective work has given a verdict: galactic mergers do not usually whet the appetite of the black holes that power these active galactic nuclei, meaning other, less dramatic phenomena are responsible. Most galaxies, including our own, have a huge but well-behaved black hole at their heart, while some have messy...

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2010-11-02 07:50:00

Team uses observations from powerful radio telescope in high Andean desert; results will help scientists understand how universe is evolving An international team of scientists led by Rutgers University astrophysicists have discovered 10 new massive galaxy clusters from a large, uniform survey of the southern sky. The survey was conducted using a breakthrough technique that detects "shadows" of galaxy clusters on the cosmic microwave background radiation, a relic of the "big bang" that gave...

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2009-11-02 12:47:07

Solar wind generated by the sun is probably driven by a process involving powerful magnetic fields, according to a new study led by UCL (University College London) researchers based on the latest observations from the Hinode satellite. Scientists have long speculated on the source of solar winds. The Extreme Ultraviolet Imaging Spectrometer (EIS), on board the Japanese-UK-US Hinode satellite, is now generating unprecedented observations enabling scientists to provide a new perspective on the...

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2009-09-29 06:45:00

This summer, University of Florida astronomers inaugurated the world's largest optical telescope on a nearly 8,000-foot mountaintop 3,480 miles away. But it was a far more modest observatory, located just above sea level in rural Levy County and just down the road from the UF campus, that proved key to a new discovery about what one astronomer termed "one of the weirdest" planets outside our solar system. Three UF astronomers are among the authors of a paper that will appear Thursday in...

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2009-09-22 15:25:00

The precise conditions inside a white dwarf star in the hours leading up to its explosive end as a Type Ia supernova are one of the mysteries confronting astrophysicists studying these massive stellar explosions. But now, a team of researchers, composed of three applied mathematicians at the U.S. Department of Energy's (DOE) Lawrence Berkeley National Laboratory and two astrophysicists, has created the first full-star simulation of the hours preceding the largest thermonuclear explosions in...

0eb59dc6d43cc6bd742b84f60f851b391
2009-06-15 16:16:26

The interstellar stuff that became incorporated into the planets and life on Earth has younger cosmic roots than theories predict, according to the University of Chicago postdoctoral scholar Philipp Heck and his international team of colleagues. Heck and his colleagues examined 22 interstellar grains from the Murchison meteorite for their analysis. Dying sun-like stars flung the Murchison grains into space more than 4.5 billion years ago, before the birth of the solar system. Scientists know...

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2009-05-26 06:45:00

Since the early 1990s astronomers have discovered more than 300 planets orbiting stars other than our sun, nearly all of them gas giants like Jupiter. Powerful space telescopes, such as the one that is central to NASA's recently launched Kepler Mission, will make it easier to spot much smaller rocky extrasolar planets, or exoplanets, more similar to Earth. But seen from dozens of light years away, an Earth-like exoplanet will appear in telescopes as little more than a "pale blue dot," the...

ac593ff5b389359454bf335a9bb4dbb11
2009-04-28 08:15:00

During the last two decades, astronomers have found hundreds of planets orbiting stars outside our solar system. New research indicates they might have found even more except for one thing "“ some planets have fallen into their stars and simply no longer exist. The idea that gravitational forces might pull a planet into its parent star has been predicted by computer models only in the last year or so, and this is the first evidence that such planet destruction has already occurred, said...


Latest Astrophysical Journal Reference Libraries

The Astronomical Journal
2012-05-08 15:08:15

The Astronomical Journal (AJ) is a peer-reviewed scientific journal ran by the American Astronomical Society and published monthly by the Institute of Physics Publishing. It is one of the premier astronomy journals in the world. It was published by the University of Chicago Press until 2008. The society also owns the Astrophysical Journal. The journal was established in 1849 by Benjamin A. Gould. In 1861, publication was ceased due to the American Civil War. It went unpublished until 1885....

Publications Of The Astronomical Society Of The Pacific
2012-05-01 10:04:14

Publications of the Astronomical Society of the Pacific is a monthly scientific journal managed by the Astronomical Society of the Pacific and published by the University of Chicago Press. It has been in publication since 1899, and is one of the premier journals for astronomical research, along with The Astrophysical Journal, The Astronomical Journal, Astronomy and Astrophysics, and Monthly Notices of the Royal Astronomical Society. This journal publishes astronomy research, review papers,...

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Word of the Day
lunula
  • A small crescent-shaped structure or marking, especially the white area at the base of a fingernail that resembles a half-moon.
This word is a diminutive of the Latin 'luna,' moon.
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