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White dwarfs, which are comprised primarily of carbon, are the remnant cores of stars that have completed core fusion.
After evolving from an initial mass of 3-4+ solar masses
and passing from a hydrogen helium starcore burning stage to a first phase red
giant stage to another hydrogen helium starcore burning stage to a second red
giant stage, the star shakes off the boundaries of its extended envelope,
bursting forth, a sparkling stellar butterfly emerging from its cocoon and
unfolding its wings.
Like a flower quickening in
the fertile aerated soil of the earth until it suddenly erupts into full blossom
from its seed to a welcoming resonance of nature sounds, the star becomes a
radiant spherical shell surrounding a solidly burning planetary-nebula starcore
with a 0.5-1.0 solar mass which eventually cools to form a white dwarf. Sirius,
the brightest star in the night sky, has a white dwarf companion.
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Astronomical
Cosmological Extraterrestrial 
