n. 25B6; noun
the gases present in the atmosphere : AIR, sky, airspace; poetic/literary the heavens, the firmament, the blue, the azure, the ether. See list.
the hotel has a relaxed atmosphere : AMBIENCE, air, mood, feel, feeling, character, tone, tenor, aura, quality, undercurrent, flavour; informal vibe.
Layers of the Earth's Atmosphere
exosphere stratosphere
ionosphere thermosphere
mesosphere troposphere
ozonosphere