Monday, August 11, 2008

INFO : Stellar evolution

Stellar evolution

Stellar evolution is the process by which a star undergoes a sequence of radical changes during its lifetime. Depending on the mass of the star, this lifetime ranges from only few millions of years (for the most massive) to trillions of years (for the less massive), considerably more than the age of the universe.

Stellar evolution is not studied by observing the life of a single star: most stellar changes occur too slowly to be detected, even over many centuries. Instead, astrophysicists come to understand how stars evolve by observing numerous stars, each at a different point in its life, and by simulating stellar structure with computer models.

Projected timeline of the Sun's life.


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