pmhch11b - 11.4 Formation of Stars Like the Sun Star...

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11.4 Formation of Stars Like the Sun Star formation happens when part of a dust cloud begins to contract under its own gravitational force; as it collapses, the center becomes hotter and hotter until nuclear fusion begins in the core.
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11.4 Formation of Stars Like the Sun When looking at just a few atoms, the gravitational force is nowhere near strong enough to overcome the random thermal motion:
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11.4 Formation of Stars Like the Sun Stars go through a number of stages in the process of forming from an interstellar cloud:
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11.4 Formation of Stars Like the Sun Stage 1: Interstellar cloud starts to contract, probably triggered by shock or pressure wave from nearby star. As it contracts, the cloud fragments into smaller pieces.
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11.4 Formation of Stars Like the Sun Stage 2: Individual cloud fragments begin to collapse. Once the density is high enough, there is no further fragmentation. Stage 3: The interior of the fragment has begun heating, and is about 10,000 K.
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11.4 Formation of Stars Like the Sun The Orion Nebula is thought to contain interstellar clouds in the process of condensing, as well as protostars.
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This note was uploaded on 03/18/2008 for the course AST 301 taught by Professor Harvey during the Fall '07 term at University of Texas at Austin.

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pmhch11b - 11.4 Formation of Stars Like the Sun Star...

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