Why is there so much helium on Jupiter and so little helium on earth?

Answer 1

The gravity isn't enough to hold the helium down and it drifts to the edge of the atmosphere and then the solar wind blows it out into deep space.

Jupiter is a very much bigger planet with a strong magnetic field that holds the gas much tighter and the magnetic field deflects the solar wind.

Answer 2

It's the difference in the gravitational force. We just couldn't hang on to what may have been here.

Answer 3

It's the difference in the gravitational force. We just coudn't hang on to what may have been here.