The Birth of Stars
Guiding Questions
Understanding how stars evolve requires both observation and ideas from physics
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Interstellar gas and dust pervade the Galaxy
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Protostars form in cold, dark nebulae
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Protostars evolve into main-sequence stars
The more massive the protostar, the more rapidly it evolves
During the birth process, stars both gain and lose mass
A circumstellar accretion disk provides material that a young star ejects as jets
Clumps of glowing gas called Herbig-Haro objects are sometimes found along these jets and at their ends
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Young star clusters give insight into star formation and evolution
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Star birth can begin in giant molecular clouds
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O and B Stars and Their Relation to H II Regions
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Supernovae compress the interstellar medium and can trigger star birth
Key Words
Author: Michael Cohen
E-mail: mrcohe@ship.edu
Homepage: http://physics.ship.edu/~mrc/