What is the atmosphere

At·mos·phere ˈatməsˌfir / noun 1. the envelope of gases surrounding the earth or another planet."part of the sun's energy is absorbed by the earth's atmosphere" synonyms: air, aerospace; More 2. the pervading tone or mood of a place, situation, or work of art."the hotel is famous for its friendly, welcoming atmosphere" synonyms: ambience, air, mood, feel, feeling, character, tone, tenor, aura, quality, undercurrent, flavor; informalvibe"the hotel has a relaxed atmosphere"

The gasses around the earth or any planet