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Latest White dwarf Stories

Astronomers Observe White Dwarfs Imitating Black Holes
2012-12-18 14:20:20

University of Southampton researchers reported they have observed bright X-ray flares in a nearby galaxy being produced by a white dwarf.

Brown Dwarf Stars Can Grow Rocky Planets
2012-11-30 06:05:22

Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) have discovered that the outer region of a dusty disc encircling a brown dwarf contains solid grains like those found in denser discs of newborn stars.

Bright And Dim Supernovae Teach Us A Lot
2012-11-20 10:13:34

Two different groups of astronomers – one studying unusually dim supernovae, the other unusually bright ones – say both types can teach us a lot about the universe.

Aging Stars Sculpt Spectacular Shape Of Planetary Nebula
2012-11-08 14:21:55

Astronomers have discovered a pair of stars orbiting each other at the center of a remarkable example of a planetary nebula. The latest find confirms a theory about what controls the spectacular and symmetric appearance of the material flung out into space.

New Scenario for the Birth of Type Ia Supernovae
2012-10-26 05:49:37

Astronomer J. Craig Wheeler reports in The Astrophysical Journal that he has a new theory on the identity of the "parents" of Type Ia supernovae.

Old Star May Have A Companion
2012-10-10 15:10:33

Astronomers have discovered an unexpected spiral structure in the material around an old star called R Sculptoris

Supernova Was Caused By A Yellow Supergiant
2012-09-29 06:47:07

A team of Japanese researchers has discovered evidence that a yellow supergiant was, in fact, the progenitor for a recently discovered supernova -- a discovery which they say raises serious questions regarding our understanding of the evolution of massive stars.

Supernova Cause Revealed A Millennium Later
2012-09-28 10:32:37

Just over 1,000 years ago, one of the brightest stellar events ever recorded in history was widely observed by a number of civilizations across the globe.


Latest White dwarf Reference Libraries

White Dwarf
2004-10-19 04:45:43

White Dwarf -- A white dwarf is a a star supported by electron degeneracy. A star like our Sun will become a white dwarf when it has exhausted its nuclear fuel. Near the end of its nuclear burning stage, such a star goes through a red giant phase and then expels most of its outer material (creating a planetary nebula) until only the hot (T > 100,000 K) core remains, which then settles down to become a young white dwarf. A typical white dwarf is half as massive as the Sun, yet only...

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2004-10-19 04:45:42

Stellar Evolution -- Stellar evolution is the process of formation, life, and death of stars. It is one of the major topics of cosmogony. Star Birth and Life A star starts out as an enormous cloud of gas and dust many light-years across. Star formation begins when the cloud begins to condense under its own gravity. The processes that initiate this contraction are not fully understood. The cloud fragments fuse into stellar mass clouds known as protostars. Protostars do not emit...

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2004-10-19 04:45:42

Nova -- A nova is an enormous nuclear explosion caused by the accretion of hydrogen onto the surface of a white dwarf star. When a white dwarf has a close companion star, the companion will often begin to have its outer atmosphere drawn away from it by the white dwarf's gravity as the companion star ages and expands into a red giant. The gases so captured consist primarily of hydrogen and helium, the two principle constituents of matter in the universe. The gases are compacted on the...

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2004-10-19 04:45:41

Cataclysmic Variable Star -- Cataclysmic variables are a class of binary stars containing a white dwarf and a companion star. The companion star is usually a red dwarf, although in some cases it is another white dwarf or a slightly evolved star (subgiant). Several hundreds of cataclysmic variables are known. From the observational viewpoint, cataclysmic variables are relatively easy to discover. They are usually quite blue objects, as the majority of stars are red. The variability of...

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2004-10-19 04:45:40

Sirius -- Sirius (α Canis Major, also known as the Dog Star) is the brightest star (-1.46m) in the night sky and can be seen from every inhabited region of the Earth's surface. At a distance of 8.6 light years, Sirius is also one of the nearest stars to Earth. It is a main sequence star of spectral type A0 or A1 and has a mass about 2.4 times that of the Sun. Sirius has a white dwarf companion called Sirius B which orbits it with a period close to 50 years. It was the first white...

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shavie
  • A trick or prank.
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