UNIVERSE
PLANETARY FORMATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What forms in the very center of the accretion disk?
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A protostar
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A planet
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A protoplanet
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A planetesimal
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Explanation:
Detailed explanation-1: -The protoplanetary disk may also be considered an accretion disk for the star itself, because gases or other material may be falling from the inner edge of the disk onto the surface of the star. This process should not be confused with the accretion process thought to build up the planets themselves.
Detailed explanation-2: -The redistribution of angular momentum within the protostar–disc system is facilitated mainly by gravitational instability; this allows formation of relatively large discs even when the specific angular momentum of infalling material is low.
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