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02232_Field_supernova (Type II).txt
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1995-11-04
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all the energy that our Sun will
produce over the course of its entire
10-billion-year lifetime.
Type I supernovae are thought to
occur in binary star systems, where a
very small, very dense star known as
a white dwarf orbits around a normal
star. Under certain conditions the
white dwarf may draw in matter
from the normal star. If the white
dwarfΓÇÖs mass approaches 1.4 times
that of the Sun, a point known as the
Chandrasekhar limit, the
accumulation of extra mass may
cause it suddenly and violently to
collapse.