Atmosphere
An atmosphere (from Greek ἀτμός (atmos), meaning "vapour", and σφαῖρα (sphaira), meaning "sphere") is a layer of gases surrounding a planet or other material body of sufficient mass that is held in place by the gravity of the body. An atmosphere is more likely to be retained if the gravity is high and the atmosphere's temperature is low.
The atmosphere of Earth is mostly composed of nitrogen. It also contains oxygen used by most organisms for respiration and carbon dioxide used by plants, algae and cyanobacteria for photosynthesis. It protects living organisms from genetic damage by solar ultraviolet radiation, solar wind and cosmic rays. Its current composition is the product of billions of years of biochemical modification of the paleoatmosphere by living organisms.
The term stellar atmosphere describes the outer region of a star, and typically includes the portion starting from the opaque photosphere outwards. Stars with sufficiently low temperatures may form compound molecules in their outer atmosphere.
Space Science Fiction Sci-Fi Firefly Serenity Planet Atmosphere
03-K64-Firefly class Mid-bulk transport "Serenity" entering atmosphere, beginning of the film...
Holy Cross Mountains
Sky Night Star Atmosphere Astronomy Galaxy Astronomical object Geological phenomenon Moonlight Outer space
I tried to draw a picture I had taken in Holy Cross Mountains :P