Saturn has the moon Titan which has a thick hazy atmosphere.
Where a planet or moon has an atmosphere, it is the gravity of the moon or planet that holds the atmosphere on the planet or moon.
Mercury has no moon nor an atmosphere.
Titan is the moon with atmosphere, it's the moon of Saturn
The planet Mars has a very thin atmosphere, similar to the moon.
All of the planets except Mercury and Venus, which have no moons, have at least one moon that lacks an atmosphere.
I'm guessing you meant the planet with the only moon with a THICK atmosphere, since many moons have an atmosphere, although in very small amounts. If that's the case, then the answer is Saturn, with Titan as its moon, which is the only moon that have a thick atmosphere.
titon
earth
The moon Titan has an atmosphere. Titan is a moon for the planet Saturn and is also the largest moon for the planet.
No. The only planet or moon to have a breathable atmosphere is Earth.
No. An atmosphere is the layer of gas surrounding a planet or moon. It is air.
jupiter