UNIVERSE
SOLAR SYSTEM FORMATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What causes the gas & dust of an intrasellar cloud to move together or collapse?
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Wind
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Gravity
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stars
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None of the above
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Explanation:
Detailed explanation-1: -In the protostellar gas cloud, the inward force due to gravity is balanced by the outward force due to heat pressure. Radiation by molecules removes heat, allowing collapse of the gas cloud. Source: The Birth of Stars, by NASA.
Detailed explanation-2: -STAR BIRTHS are started when the interstellar matter in gas clouds, such as the Eagle Nebula shown here, compresses and fuses. Irregularities in the density of the gas causes a net gravitational force that pulls the gas molecules closer together.
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