Question

place these bodies of our solar system in the proper order of formation.
planetesimals
outer planets
inner planets
the sun
solar nebula

Explanation:

The solar system formed from a collapsing solar nebula. First, the Sun condensed at the center of the nebula. Then, small solid particles called planetesimals formed from leftover material. Rockier inner planets formed close to the Sun where volatile materials couldn't condense, while gas-rich outer planets formed further out where ices could accumulate.

Answer:

1. solar nebula
2. the Sun
3. planetesimals
4. inner planets
5. outer planets