Sat March 02, 2013 By: Aditya Kumar Singh

why there is no atmosphere on moon? is there something related to escape velocity.

Expert Reply
Mon March 04, 2013
If we calculate the escape velocity on moon's surface it comes as a small quantity which is much less(2.3 km/sec)  than the average (thermal )molecular speed of gases on moon  therefore, there is no atmosphere on the moon.
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