News tagged with white dwarfs

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One supernova type, two different sources

The exploding stars known as Type Ia supernovae serve an important role in measuring the universe, and were used to discover the existence of dark energy. They're bright enough to see across large distances, ...

May 07, 2012
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NASA’s STEREO spots a new nova

While on duty observing the Sun from its position in solar orbit, NASA’s STEREO-B spacecraft captured the sudden appearance of a distant bright object. This flare-up turned out to be a nova — designated ...

May 01, 2012
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The Helix Nebula in new colors

(PhysOrg.com) -- ESO's VISTA telescope, at the Paranal Observatory in Chile, has captured a striking new image of the Helix Nebula. This picture, taken in infrared light, reveals strands of cold nebular gas ...

Jan 19, 2012
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Origin of thermonuclear supernova discovered

(PhysOrg.com) -- Using NASA’s Hubble Space Telescope, astronomers have solved a longstanding mystery on the type of star, or so-called progenitor, which caused a supernova seen in a nearby galaxy. The ...

Jan 11, 2012
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The progenitor problem

With so much of our current understanding of the universe based on Type 1a supernovae data, a good deal of current research is focused upon just how standard these supposed standard candles are. To date, the ...

Nov 28, 2011
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G299.2-2.9, a middle-aged supernova remnant

(PhysOrg.com) -- G299.2-2.9 is an intriguing supernova remnant found about 16,000 light years away in the Milky Way galaxy. Evidence points to G299.2-2.9 being the remains of a Type Ia supernova, where a white ...

Oct 13, 2011
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Team finds Type Ia supernovae parents

Type Ia supernovae are violent stellar explosions whose brightness is used to determine distances in the universe. Observing these objects to billions of light years away has led to the discovery that the universe is expanding ...

Aug 11, 2011
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