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How were the planets formed?

Answer 1

Aggregation/conglomeration of mass by gravitational attraction.

Similar to the stars themselves, and from the same raw materials (residues from supernovae, interstellar matter), the planets formed by the gradual grouping of those materials. Further meteor/asteroid impacts may have added minor amounts of mass.

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Answer 2

Levi Anderson

The solar nebula, a rotating disk of gas and dust surrounding the young Sun, is the source of the planets in our solar system. Small particles collided and aggregated over time to form larger bodies known as planetesimals, which then continued to collide and grow into protoplanets, which eventually became the planets we see today. This process is known as accretion.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.