How did Earth and other planets form? Were planets formed in situ? Or are orbital changes relatively frequent?
Answers
Answer:
I am sure the planets of the solar system formed in situ where the solar nebula collapsed by gravity into the sun plus planets.
If you throw a block of granite into an open fire, it will take time to heat up. If you take it out of the fire when red-hot, it will radiate heat all night (that is how we warm our tents in the winter months). Thus, heat moves slowly through a block of rock. In the same way, heat moves upwards from the core and mantle, but it takes a long time for heat to move to the surface, some 6,000 km away from the centre
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. 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.The Solar System has evolved considerably since its initial formation. Many moons have formed from circling discs of gas and dust around their parent planets, while other moons are thought to have formed independently and later been captured by their planets