The last statement is the most accurate answer. The planets in the solar system were formed from the remaining materials left over after the formation of the Sun. About 4.6 billion years ago, a massive cloud of gas and dust called the solar nebula collapsed under its own gravitational pull. As it collapsed, the cloud began to spin faster and flatten into a disk shape, with most of the mass concentrated at the center.
At the center of this spinning disk, the Sun formed, while the remaining gas and dust particles in the disk began to clump together due to gravity. These clumps, called planetesimals, collided and merged with each other, gradually growing bigger. Over time, as the planetesimals continued to accumulate more mass, they eventually formed protoplanets.
As the protoplanets grew larger, their gravitational pull increased, allowing them to attract more and more surrounding gas particles. This process, known as accretion, led to the formation of the planets in our solar system. The gas particles that were pulled in by the protoplanets eventually formed the atmospheres of the terrestrial planets (Mercury, Venus, Earth, and Mars), while the gas giants (Jupiter and Saturn) accumulated vast amounts of hydrogen and helium.
So, the planets in the solar system were formed through a combination of gravity, accretion, and the clumping together of dust and gas particles in the solar nebula.
How were the planets in the solar system formed?
The solid materials were focused out of the sun's disc and cooled down.
The gas particles released by the sun were pulled away and became solid.
The dust particles were attracted by gravity from distant galaxies.
The remaining materals from the sun's formation clumped together due to gravity.
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