Why doesn't solar wind move dust on the moon?

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Andrea Lewis

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Why doesn't solar wind move dust on the moon?
« on: 19/01/2011 16:30:06 »
Andrea Lewis  asked the Naked Scientists:
   
Hi everyone
 
I know the moon doesn't have an atmosphere therefore the dust doesn't move, but if the solar wind is strong enough to remove an atmosphere from a planet, why doesn't it move the dust on the moon???
 
Keep up the great podcasts!
 
Many thanks
 
Andrea Lewis
Hobart  Tasmania  Australia

What do you think?
« Last Edit: 19/01/2011 16:30:06 by _system »

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Offline CliffordK

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Why doesn't solar wind move dust on the moon?
« Reply #1 on: 20/01/2011 00:27:01 »
The solar wind reaching Earth is high speed, charged ions, but on the range of 5-10 particles per cc.  Even though moon dust is very fine, I don't think the low density of solar wind is enough to move it.

The moon doesn't have enough gravity to hold a significant atmosphere.