Athmosphere will be diffrent depending on the planet you are entering in or it could be random for example inferno planet have red sky and sparks of fire everywhere while meteors are falling in the background dont worry they wont hurt you but can make game more shaky when falling on the ground there will be explosion effect
So basically a mix of environments and “planetary” missions.
Both of them were suggested. Just the atmospheric mission was also suggested (just type ‘atmosphere’ in the search box).