News tagged with white dwarfs

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The evidence for pair-instability supernovae

A supernova is a stellar explosion. They can occur when a large star exhausts its ability to fuse hydrogen into higher elements, and its core collapses. The resulting rebound rips apart the outer layers of ...

dateOct 06, 2014 in Astronomy
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Measuring a Monstrous Supernova

A rare Type Ia supernova whose progenitor star had a mass some two and a half times that of our sun - much more mass than a Type Ia progenitor should be able to accumulate before it explodes - has led members ...

dateMar 25, 2010 in Astronomy
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Hubble reveals the ring nebula's true shape

(Phys.org) —The Ring Nebula's distinctive shape makes it a popular illustration for astronomy books. But new observations by NASA's Hubble Space Telescope of the glowing gas shroud around an old, dying, ...

dateMay 23, 2013 in Astronomy
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Galactic X-ray emissions originate from stars

(PhysOrg.com) -- A 25-year old astronomical mystery has been solved: Most of the diffuse X-ray emissions in the Milky Way do not originate from one single source but from so-called white dwarfs and from stars ...

dateMay 05, 2009 in Astronomy
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Image: March of asteroids across dying star

(Phys.org) —In an unexpected juxtaposition of cosmic objects that are actually quite far from each other, a newly released image from NASA's Wide-Field Infrared Survey Explorer (WISE) shows a dying star, ...

dateDec 13, 2013 in Astronomy
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Into the eye of the helix

(PhysOrg.com) -- The Helix Nebula, NGC 7293, lies about 700 light-years away in the constellation of Aquarius (the Water Bearer). It is one of the closest and most spectacular examples of a planetary nebula.

dateFeb 25, 2009 in Astronomy
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