Question

Were there any planets in the solar system before other than the current planets? If so, what happened to them?

Answer 1

Answer:

The formation and evolution of the Solar System began about 4.5 billion years ago with the gravitational collapse of a small part of a giant molecular cloud.[1] Most of the collapsing mass collected in the center, forming the Sun, while the rest flattened into a protoplanetary disk out of which the planets, moons, asteroids, and other small Solar System bodies formed.