Why is Jupiter so big?

Question

Why is Jupiter so big?

Answer 1

In my theory.. Jupiter is Brown Dwarf wannabe. but it doesn't have enough mass to become one.. Both Brown Dwarf and Jupiter-like Planet are a big ball of hydrogen..

Answer 2

because more mass contributed into making it!

Answer 3

Git!

Just so everyone knows...

LemmyK witnessed me being asked this by a 6yr old yesterday afternoon (we had a school age summer program (K-3) group visiting our campus observatory)

Now he's teasing me...

So - now you all have to give an answer that a 6yr old would get...