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Stellar Opposites: Sky survey reveals new halo of stars

The Milky Way galaxy possesses a distinct outer halo that orbits in the opposite direction from its inner halo and the rest of the galaxy.

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Keywords: stellar, opposites, sky, survey, reveals, halo, stars, opposite, reveal, star

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1. XMM-Newton reveals X-rays from gas streams around young stars
   05-31-2007 · European Space Agency (ESA)
   XMM-Newton has surveyed nearly two hundred stars under formation to reveal, contrary to expectations, how streams of matter fall onto the young stars' magnetic atmospheres and radiate X-rays.
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2. A&A special feature: XMM-Newton deciphers the magnetic physics around forming stars
   05-31-2007 · EurekAlert!
   Astronomy & Astrophysics is publishing a special feature this week dedicated to the XMM-Newton extended survey of the Taurus molecular cloud. One of the main results is the identification of unusual physical processes not known before in forming stars. These unprecedented observations suggest that the gas streams falling down onto the forming star and the jets being ejected from it both play major roles in the production of X-rays.
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3. The secret life of galaxies
   01-10-2008 · EurekAlert!
   Looking up at the night sky you could be forgiven for believing that the sedate progress of the stars across the firmament belies the serene nature of galaxies. But a closer look at our celestial neighbors reveals that the reality is very different.
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4. Star family seen through dusty fog
   03-13-2007 · EurekAlert!
   Images made with ESO's New Technology Telescope at La Silla by a team of German astronomers reveal a rich circular cluster of stars in the inner parts of our Galaxy. Located 30,000 light-years away, this previously unknown closely-packed group of about 100,000 stars is most likely a new globular cluster.
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5. Portrait of a dramatic stellar crib
   12-21-2006 · EurekAlert!
   A new, stunning image of the cosmic spider, the Tarantula Nebula and its surroundings, finally pays tribute to this amazing, vast and intricately sculpted web of stars and gas. The newly released image, made with ESO's Wide Field Imager on the 2.2-m ESO/MPG Telescope at La Silla, covers 1 square degree on the sky and could therefore contain four times the full moon.
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6. Hubble finds multiple stellar 'baby booms' in a globular cluster
   05-02-2007 · EurekAlert!
   Analysis of Hubble observations of the massive globular cluster NGC 2808 provides evidence that it has three generations of stars that formed early in the cluster's life. This is a major upset for conventional theories as astronomers have long thought that globular star clusters had a single "baby boom" of stars early in their lives and then settled down into a long, quiet middle age.
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7. Unusual supernovae may reveal intermediate-mass black holes in globular clusters
   01-29-2008 · EurekAlert!
   A strange and violent fate awaits a white dwarf star that wanders too close to a moderately massive black hole. According to a new study, the black hole's gravitational pull on the white dwarf would cause tidal forces sufficient to disrupt the stellar remnant and reignite nuclear burning in it, giving rise to a supernova explosion with an unusual appearance.
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8. Double explosion heralds the death of a very massive star
   06-13-2007 · EurekAlert!
   A unique discovery of two celestial explosions at exactly the same position in the sky has led astronomers to suggest they have witnessed the death of one of the most massive stars that can exist. A global collaboration of astronomers, led by Queen's University Belfast teamed up with Japanese supernova hunter Koichi Itagaki to report an amazing new discovery in Nature this week.
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9. New technology enables astronomers to detect two supermassive black holes in colliding galaxies
   05-17-2007 · EurekAlert!
   Astronomers, including UCR’s Gabriela Canalizo, have used powerful adaptive optics technology at the W.M. Keck Observatory in Hawai‘i to reveal the precise locations and environments of a pair of supermassive black holes at the center of an ongoing collision between two galaxies 300 million light-years away. Each of the black holes resides at the center of a rotating disk of stars and is surrounded by a cloud of young star clusters formed in the merger.
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10. Stellar tiramisu
    07-07-2007 · EurekAlert!
    Looking at the chemical composition of stars that host planets, astronomers have found that while dwarf stars often show iron enrichment on their surface, giant stars do not. The astronomers think that the planetary debris falling onto the outer layer of the star produces a detectable effect in a dwarf star, but this pollution is diluted by the giant star and mixed into its interior.
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