Question

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

Explanation:

The solar system formation starts with the solar nebula (a cloud of gas and dust). Then, the Sun forms from the collapsing nebula. Next, planetesimals (small rocky/icy bodies) form. After that, inner planets (terrestrial, formed from planetesimals in the inner nebula) and then outer planets (gas giants, formed later in the cooler outer nebula) form. So the order is solar nebula → the Sun → planetesimals → inner planets → outer planets.

Answer:

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