GK
SOLAR SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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As a nebula collapses to form a solar system (according to the “nebular hypothesis"), which of these happens FIRST?
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The young solar nebula begins to collapse because of gravity.
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Small planetesimals collide with larger ones, and the planets begin to grow.
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -Our solar system formed at the same time as our Sun as described in the nebular hypothesis. The nebular hypothesis is the idea that a spinning cloud of dust made of mostly light elements, called a nebula, flattened into a protoplanetary disk, and became a solar system consisting of a star with orbiting planets [12].
Detailed explanation-2: -Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula – a spinning, swirling disk of material.
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