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What keeps the atmosphere of a planet in place?

by oscar_lai_hk
Tags: atmosphere, planet
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oscar_lai_hk
#1
Nov29-07, 03:28 AM
P: 12
What keeps the atmosphere of a planet in place? THZ
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russ_watters
#2
Nov29-07, 05:31 AM
Mentor
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Gravity.
Integral
#3
Nov29-07, 05:37 AM
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Integral's Avatar
P: 7,315
Note that the temperature of our atmosphere high enough that the average velocity of the lighter gases, Hydrogen and helium, is greater then the earths escape velocity. Thus we do not find them in our atmosphere.


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