Protostar | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-06-23

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Protostar


00:00:46 1 History
00:01:35 2 Protostellar evolution
00:05:32 3 Observed classes of young stars
00:05:43 4 Gallery
00:05:52 5 See also



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Speaking Rate: 0.7892106950429484
Voice name: en-US-Wavenet-E


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SUMMARY
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A protostar is a very young star that is still gathering mass from its parent molecular cloud. The protostellar phase is the earliest one in the process of stellar evolution. For a low mass star (i.e. that of the Sun or lower), it lasts about 500,000 years  The phase begins when a molecular cloud fragment first collapses under the force of self-gravity and an opaque, pressure supported core forms inside the collapsing fragment. It ends when the infalling gas is depleted, leaving a pre-main-sequence star,  which contracts to later become a main-sequence star at the onset of Hydrogen fusion.