Why do we have 4 ‘rock’ planets in a row then 4 ‘gas’ planets in a row?

Question

If we discount dwarf planets after the asteroid belt all planets are gas, is there a specific reason or is it just coincidence

In: 2019

Answer 1

This blog has a series of posts on the Solar System’s story. These two posts are relevant to your question and are worth a read:
https://planetplanet.net/2022/06/28/growth-and-migration-of-the-giant-planets/
https://planetplanet.net/2022/06/29/formation-of-the-rocky-planets-choose-your-own-adventure/