What is the main idea of the solar nebula theory?

What force caused the solar nebula to collapse?

What is the name given to the leftover debris from the solar nebula that didn't form into planets?

In the solar nebula, where did the heavier elements like iron and nickel tend to collect?

What is a protoplanetary disk?

What caused the temperature gradient in the solar nebula?

Which of these is NOT a stage in the formation of a planet according to the solar nebula theory?

What primarily makes up the solar nebula?

According to the solar nebula theory, what formed first?

What process caused planetesimals to grow into protoplanets?