Question

What's responsible for preventing the gas giants from collapsing into a star?

Answer 1

They spin very quickly on their axes.

Step-by-step explanation:

The gas giants spin very quickly, creating a strong centrifugal force. This strong centrifugal force prevents them from collapsing under gravity.

Answer 2

Gas giants do not have enough mass that holds much gravitation force to ensure collapsing into a star. The gravitation pull is not strong enough to cause the fusion of hydrogen atoms. These gas giants, such as Jupiter, therefore, do not become stars.