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[[File:Stars.jpg|thumb|400px]]
 
[[File:Stars.jpg|thumb|400px]]
Stars are massive, luminous spheres of plasma held together by gravity. By the end of their lives they may also contain degenerate matter. By the very end of their lives, their internal pressure is often too weak to resist their own gravitational pull, and they collapse into [[Black Hole|black holes]].
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Stars are massive, luminous spheres of plasma held together by gravity. By the end of their lives they may also contain degenerate matter. By the very end of their lives, their internal pressure is often too weak to resist their own gravitational pull, and they collapse into [[Black Hole|black holes]].
   
Stars are often orbited by [[Planet|planets]] and are then referred to as [[Sun|suns]].
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Stars are often orbited by [[Planet|planets]] and are then referred to as [[Sun|suns]]. A star's distance from a planet is one of many factors determining whether and what sort of life can evolve there.
 
[[Category:Celestial Phenomena]]
 
[[Category:Celestial Phenomena]]

Revision as of 05:06, February 9, 2012

Stars

Stars are massive, luminous spheres of plasma held together by gravity. By the end of their lives they may also contain degenerate matter. By the very end of their lives, their internal pressure is often too weak to resist their own gravitational pull, and they collapse into black holes.

Stars are often orbited by planets and are then referred to as suns. A star's distance from a planet is one of many factors determining whether and what sort of life can evolve there.

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