Is there a reason why we have four “rock” planets lined up followed by four “gas” planets in a row, or is it merely coincidence?

Question

Is there a reason why we have four “rock” planets lined up followed by four “gas” planets in a row, or is it merely coincidence?

In: Planetary Science

Answer 1

In some groups theirs 2 gas giants and 2 ice giants. Neptune and Uranus are different from Saturn and Jupiter. Saturn and Jupiter are mostly hydrogen and helium. Neptune and Uranus are only 20% hydrogen and mostly heavier materials like oxygen and ammonia.

So it may be 4 terrestrial, 2 gas giants, and 2 ice giants.

Answer 2

The only answer, no one knows.

It’s funny reading about “scientists” finding this or the, or making a certain claim, and then you see this

https://www.livescience.com/space/cosmology/james-webb-telescope-confirms-there-is-something-seriously-wrong-with-our-understanding-of-the-universe

Or, when you hear for years about “dark matter” only to read recently that they’re saying dark matter doesn’t exist