Sigilum Sanctum, on 02 September 2015 - 11:07 PM, said:
Please refrain from posting such abject ignorance, thank you.
Gravity just attracts an atmosphere, it can't hold on to one by itself. If gravity was the only qualifier for an atmosphere, a LOT of orbital bodies would have them, but they don't. No magnetic field, no atmosphere for you.
Unless of course you dispute that solar radiation is capable of stripping an atmosphere...