The atmosphere was laden with moisture. The atmosphere constantly changes.
yes
yes
gas
rock
Pluto has no atmosphere
it is the atmophere of the earth
The earths atmophere came from your mom!
Yes BUT it is too thin to be one so we say it doesn't.
you can mine the gas. you can map the surface,. you can extract energy from the difference of heat in the atmophere.
A meteor and I checked Google
Well, the Co2 turns into slightly visible fumes and burns away at the atmosphere (o- zone layer)
Mainly because Earth has a large enough mass, and therefore a large enough gravity, to keep an atmosphere.