Most planets have an atmosphere, in addition to active comets and Saturn's moon Titan.
There is no atmosphere for the solar system, space has no air
Mercury has no atmosphere.
Mercury has no atmosphere.
But ... there are many bodies in our Solar system that have no atmosphere.
The planets, except for mercury it has no atmosphere
The solar system doesn't have an atmosphere, it occupies a piece of space which is an empty vacuum. Each planet may have its own atmosphere, a layer of gas at the surface.
Venus has the thickest atmosphere is our solar system
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.
Mercury.
Because it has an atmosphere.
Titan
earth atmosphere