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The Epic Interactive Encyclopedia 1998
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Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
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White_dwarf
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1992-09-02
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A small, hot star, the last stage in the life
of a star such as the Sun. White dwarfs have
a mass similar to that of the Sun, but only
1% of the Sun's diameter, similar in size to
the Earth. Most have surface temperatures of
8,000 degrees C/14,400 degrees F or more,
hotter than the Sun. Yet, being so small,
their overall luminosities may be less than
1% of that of the Sun. White dwarfs consist
of degenerate matter in which gravity has
packed the protons and electrons together as
tightly as is physically possible, so that a
spoonful of it weighs several tonnes. White
dwarfs are thought to be the shrunken remains
of stars that have exhausted their internal
energy supplies. They slowly cool and fade
over billions of years.