AST-308intermediate

Protostars & Pre-Main-Sequence Evolution: Physical Mechanisms

A protostar is a contracting stellar embryo that has not yet reached long-term hydrogen fusion in its core. Pre-main-sequence evolution connects cloud collapse to mature stars and planet-forming disks.

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intermediate47 minFact checked

Protostars & Pre-Main-Sequence Evolution: Physical Mechanisms

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AST-307Protostars & Pre-Main-Sequence Evolution: Structures & Vocabulary→

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AST-309Protostars & Pre-Main-Sequence Evolution: Observation, Measurement & Evidence→

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A protostar is a contracting stellar embryo that has not yet reached long-term hydrogen fusion in its core.

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Accreting gas releases gravitational potential energy as heat.

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