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Stars and Gallaxies
star evolution
6
Science
8th Grade
04/14/2008

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Term
black hole
Definition
the final stage in teh evolution of a massive star; the core collapses to a point that its gravity is so strong that not even light can escape
Term
giant
Definition
a late stage in teh life of a low-mass star, the core contracts but its outer layers expand and cool;  this is a large, bright, cool star
Term
nebula
Definition
a large cloud of gas and dust where stars are formed
Term
neutron star
Definition
very dense core of a collapsed star that can shrink to about 20 km in diameter and contains only neutrons
Term
supergiant
Definition
late stage in the life cycle of a massive star in which the core heats up and the star expands;  a large, very bright star
Term
white dwarf
Definition
a late stage in the life cycle of a low-mass star; formed when its outer layers excape into space leaving behind a hot, dense core;  a small, dim, hot star
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