Science Questions

Why does the moon have no atmosphere at all?

Sun, 20th Feb 2011

Listen Now    Download as mp3 from the show Checking the Atmosphere and Changing the Climate


Ray Etherton, via Facebook asked:

Why does the moon have no atmosphere at all?

Ray from Rylstone Australia


We posed this question to Peter Braesicke from the University of Cambridge...

Peter -   I think the Moon is just too small.  There's not enough gravity there to keep an atmosphere and so, because the Earth is much, much bigger, it is able to keep the atmosphere gravitationally together and so, that's why we enjoy the benefit of the atmosphere.


Subscribe Free

Related Content


Make a comment

yes, the mass of the moon is too small. The moon's gravity is too weak to keep gas or even liquid particles on its surface, due to ambient energy coming from the sun and from its core, in particular during its young age when it was very hot. The energy accelerates the particles to speeds beyond the escape velocity. CPT ArkAngel, Wed, 23rd Feb 2011

Actually, the moon does have an atmosphere. See this article from NASA. John Handshoe, Fri, 24th Oct 2014

See the whole discussion | Make a comment

Not working please enable javascript
Powered by UKfast
Genetics Society