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Originally posted by Observer99
It has too little gravity to hold atmosphere against the force of the solar wind, very little magnetic field to shield against the solar wind, and no processes (life, volcanism) which would generate new atmosphere. I could definitely imagine trace heavy gases hanging around the surface of any given moon, but certainly nothing you'd want to breathe.
Originally posted by 1967sander
reply to post by Frira
I am afraid that know one understood what I am trying to tell. We see the same type of cosmic ray on earth.
Which is only visible in an atmosphere. Protons collide in an atmosphere causing the umbrella reaction.
Without an atmosphere there is NO umbrella (featherlike phenomenae) visible.
Ergo: the moon must have an atmosphere!
NASA is planning to return people to the Moon, and human activity will kick up dust, expel rocket exhaust, and release other gaseous emissions into the lunar atmosphere .
This next gif shows how molecules may move near the surface of the Moon to form the atmosphere.