Titan has atmosphere and it's a moon.
Of the planets, these have significant atmospheres :
Venus, Earth, Mars, and all the "gas giants".
The sixth largest Satellite in the solar system is Europa, a moon of Jupiter.
Ganymede is the largest moon/satellite in our solar system, in orbit around the planet Jupiter.Ganymede, a moon if Jupiter, is the largest satellite in the solar system.
Jupiter
Mercury has no atmosphere.
Titan is the only satellite in the solar system to have a substantial atmosphere. Others do have very tenuous atmosphere, but Titant's atmosphere is even denser than Earth's.
Titan, a moon of Saturn, is the largest satellite in the solar system and has a substantial atmosphere. It is the only moon in the solar system known to have a dense atmosphere, composed mostly of nitrogen with traces of methane and ethane.
Ganymede, a moon of Jupiter, is the largest natural satellite in our solar system. But you could argue that Jupiter is the largest as it is a satellite of our sun. You could also argue that our own sun is a satellite of the galactic centre.
The earth is the largest planet in our atmosphere. Jupiter is the largest planet in out solar system.
Titan is the largest moon of Saturn and the second-largest natural satellite in the solar system. It is unique in that it has a thick atmosphere and a hydrocarbon-rich surface, making it one of the most Earth-like worlds in our solar system.
Mercury has no atmosphere.
Mercury.
Ganymede, a satellite [of Jupiter] is the largest moon in the solar system. It is actually bigger than Mercury.See related link for more information.