Protostar
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Transcript: A protostar is a cloud of interstellar gas and dust that’s dense enough and cool enough to contract gravitationally to form a star. An interstellar cloud may be close to the state of collapse for millions of years and be triggered by a nearby disturbance such as the death or birth of a nearby star. The collapse occurs extremely quickly on an astronomical timescale in about a hundred thousand years. This is a hundred thousand times less than the lifetime of the Sun. In the first stage of collapse it is freefall. The collapse is as rapid as gravity will allow.
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