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This is a normal post ??? I don't understand... what hasn't got mass?
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)
This is a normal post I'm not arguing!
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)
This is a normal post I'm not arguing either!
:)
(, Tue 11 Dec 2012, 12:08, Reply)
This is a normal post I think it gets enough escape velocity to get away
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)
This is a normal post If gravity worked like that we'd be permanently stuck to anything more massive than ourselves.
Gravity is very, very weak.
(, Tue 11 Dec 2012, 12:44, Reply)
This is a normal post My sofa
Has a huge gravitational pull. Explain that.
(, Tue 11 Dec 2012, 12:56, Reply)
This is a normal post It's fucking massive?

(, Tue 11 Dec 2012, 13:10, Reply)
This is a normal post It is actually,
and so is my arse, so I guess me sitting around all day is down to SCIENCE.
(, Tue 11 Dec 2012, 13:41, Reply)
This is a normal post Also lots of boring guff about weight and mass not being the same thing.

(, Tue 11 Dec 2012, 12:46, Reply)
This is a normal post That is not boring!
It might give me diet excuses.
(, Tue 11 Dec 2012, 12:51, Reply)