Jupiter is a very big planet with a strong pull called gravity.
Here’s why the rocks didn’t become one planet:
- Long ago many small rocks floated where a planet might form.
- Those rocks try to bump together and stick to make a bigger planet.
- But Jupiter’s strong gravity kept tugging and pulling on the rocks, so they couldn’t stick together.
- Because they stayed apart, those rocks now make the asteroid belt between Mars and Jupiter.
Think of Jupiter like a big fan blowing on a pile of sand—because of the strong breeze, the sand never stays in one clump.