UNIVERSE
PLANETARY FORMATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A rotating disk of gas and dust was drawn together by the force of gravity.
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The sun ejected rocky material which later went on to form the planets.
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One very large planetary body broke apart into several smaller planets.
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Several stars of different masses cooled and formed the planets and the sun.
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Detailed explanation-1: -Approximately 4.6 billion years ago, the solar system was a cloud of dust and gas known as a solar nebula. Gravity collapsed the material in on itself as it began to spin, forming the sun in the center of the nebula. With the rise of the sun, the remaining material began to clump together.
Detailed explanation-2: -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-3: -Gravity is a force that pulls objects with mass together. Gravity holds the solar system together now, and it also helped the solar system begin to form billions of years ago. The solar system began as a cloud of gas and dust particles, and gravity pulled all the particles in the cloud closer together.
Detailed explanation-4: -The solar nebular hypothesis describes the formation of our solar system from a nebula cloud made from a collection of dust and gas. It is believed that the sun, planets, moons, and asteroids were formed around the same time around 4.5 billion years ago from a nebula.