
know that. I presumed anything with a mass is heavier than anything without one, and would therefore be trapped.
( , Tue 11 Dec 2012, 11:41, Reply)

I think planets the size of Jupiter are massive enough to prevent hydrogen & helium escaping.
Also, *checks wikipedia* how close you are to a star affects it too: so the gas molecules will be more energetic.
( , Tue 11 Dec 2012, 12:00, Reply)

I thought a molecule of helium was, by it's very existance, heavier than the vacuum of space and would therefore be trapped by gravity at some height. I'm no expert and if you say I'm wrong, I'm wrong.
( , Tue 11 Dec 2012, 12:06, Reply)

Perhaps at the height at which it stops rising up through the stuffmospheres the gravity is insufficient to keep it in...
...maybe. But as you say, bigger ladders!
( , Tue 11 Dec 2012, 12:12, Reply)

Gravity is very, very weak.
( , Tue 11 Dec 2012, 12:44, Reply)

and so is my arse, so I guess me sitting around all day is down to SCIENCE.
( , Tue 11 Dec 2012, 13:41, Reply)

( , Tue 11 Dec 2012, 12:46, Reply)