Escape Velocity, Moon, Mercury Y Can A Outer Planet’s Moon The Size Of The Planet Mercury Hav A Thick Atmosphere When Mercury Itself Has None

Y can a outer planet's moon the size of the planet Mercury hav a thick atmosphere when Mercury itself has none - escape velocity, moon, mercury

Due to the concentration of the gas near the planet Jupiter, the moon was formed in extremely dense.

B The moon is the degassing of the atmosphere, so that the environment is continuously regenerated.

C satellites in the outer solar system are frequent consequences are exposed to the icy bodies - the atmosphere of a gaseous material emitted by these effects.

D The temperature in the outer solar system is low enough that gases in the atmosphere of the moon does not reach escape velocity.

E When the moon was formed just about Mercury, you can still the atmosphere, but finally lost.