A star is a massive, compact body of plasma in outer space that is currently producing or has produced energy through nuclear fusion. The most familiar and closest star to the Earth is the Sun. Unlike a planet, from which most light is reflected, a star emits light because of its intense heat. Stellar astronomy is the study of stars.

Individual stars differ from each other due to their total mass, their composition, and their age. The total mass determines the course of evolution of a star, as well as its eventual fate. A Hertzsprung-Russell diagram shows the pattern of the temperature of stars against their absolute magnitude, and can be used to determine the overall age of a star and the stage in its evolution. Initially, stars are composed primarily of hydrogen, with some helium and heavier trace elements that determine the metallicity of a star. Over the course of a star's evolution, a portion of the hydrogen is converted into heavier elements through the process of nuclear fusion. Part of the matter is then recycled back into the interstellar environment, where it is used to form a new generation of more metal-rich stars.

Multi-star systems consist of two or more stars that are gravitationally bound, and generally move around each other in stable orbits. When two such stars have a relatively close orbit, their gravitational interaction can have a significant impact on their evolution. For example, a nova occurs when a white dwarf accretes matter from a companion star.

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RT @andreakremer: @PaulMelancon oh man I haven't heard Blinker the Star in forever. Might need to fix that. // Must dig out my CD tonight!
pasquinade (Ed Lynn) Tue, 08 Dec 2009 00:54:21 -0000
RT @andreakremer: @PaulMelancon oh man I haven't heard Blinker the Star in forever. Might need to fix that. // Must dig out my CD tonight!
@PaulMelancon oh man I haven't heard Blinker the Star in forever. Might need to fix that.
andreakremer (andreakremer) Tue, 08 Dec 2009 00:48:21 -0000
@PaulMelancon oh man I haven't heard Blinker the Star in forever. Might need to fix that.
My last.fm top 3 for last week: The Posies (16), Blinker the Star (10), Doves (9). #MusicMonday
PaulMelancon (PaulMelancon) Tue, 08 Dec 2009 00:20:32 -0000
My last.fm top 3 for last week: The Posies (16), Blinker the Star (10), Doves (9). #MusicMonday
My sleep playlist tonight is long, but includes South, @Hunz, Idaho, Air, and Blinker The Star. Goodnight, all.
ou_flyer (Eric Haynesworth) Sun, 06 Dec 2009 08:18:39 -0000
My sleep playlist tonight is long, but includes South, @Hunz, Idaho, Air, and Blinker The Star. Goodnight, all.
I cannot get enough of Blinker the Star's When in Rome. That album kills.
jacksonknife (J Knife) Fri, 04 Dec 2009 17:12:30 -0000
I cannot get enough of Blinker the Star's When in Rome. That album kills.

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