Quantcast

Latest White dwarf Stories

528be4352a42b48eca57135e63a6d933
2011-04-07 08:50:00

White dwarfs are dead stars that pack a Sun's-worth of matter into an Earth-sized ball. Astronomers have just discovered an amazing pair of white dwarfs whirling around each other once every 39 minutes.

4cc821b5d74d2271868697b3308db1181
2011-03-31 07:20:00

A new paper suggests that potentially habitable planets orbiting white dwarfs could be much easier to find – if they exist – than other exoplanets located so far.

7e25d0142e1da2c2fed79a63d7b6123c1
2011-03-24 13:10:00

Pattern of X-ray 'stripes' in supernova remnant could explain how cosmic rays are produced.

8dfac4626a50ea3a567eadfd58642cdf1
2011-03-10 08:45:00

Cardiff University astronomers believe that a young star’s long "napping" could trigger the formation of a second generation of smaller stars and planets orbiting around it.

2011-01-14 10:14:27

The Royal Astronomical Society (RAS), the UK’s voice for professional astronomers and geophysicists today announced the recipients of the Society’s medals and awards for 2011.

2010-12-06 12:21:52

Astronomers have traced the waxing and waning light of exploding stars more closely than ever before and seen patterns that aren't yet accounted for in our current understanding of how these eruptions occur.

2010-12-02 20:39:28

Type Ia supernovae (SNe Ia) play an important role as cosmological distance indicators and have been used successfully to determine cosmological parameters, which resulted in the discovery of the accelerating expansion of the Universe.

0d6d34d675a9acbf880432fdbe53abc11
2010-11-23 08:00:00

An international team of astronomers have discovered a unique and exotic star system with a very cool methane-rich (or T-) dwarf star and a ‘dying’ white dwarf stellar remnant in orbit around each other.

8e81df7b858517324a01bc3e339e97ce1
2010-11-16 10:31:47

Sometimes when you're looking for one thing, you find something completely different and unexpected.

69c97f36b01643e4468e5c7b531817db1
2010-10-28 10:20:24

Astronomers using the National Science Foundation's Green Bank Telescope (GBT) have discovered the most massive neutron star yet found, a discovery with strong and wide-ranging impacts across several fields of physics and astrophysics.


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...

6_dac4e7d6b8fb5cf3a1458d796b90d7a92
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...

6_19859ff34fd03d00777232e2520ce83f4
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...

6_f1577ee462b741c03ef6a7d23d2cd6904
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...

139458main_image_feature_468_ys_4
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...

More Articles (5 articles) »
Word of the Day
chauffeuse
  • A woman chauffeur.
  • A woman who operates an automobile.
The word 'chaffeuse' comes from French, and is the feminine form of 'chauffeur'.
Related