starting billions of years ago Algae converted carbon dioxide to oxygen the algae change the atmosphere of the earth.
A layer (or layers) of gases that surround a planet and are kept in place by the gravity of the planetary body is known as an atmosphere.
It is sometimes referred to as a "sphere," "vapor," or "steam." When the atmosphere's temperature is low and its gravity is strong, a planet can maintain its atmosphere.
The outer part of a star, including the layers above the opaque photosphere, is known as the stellar atmosphere; low-temperature stars may have outer atmospheres with complex molecules.
A whirling disc of gases that compressed against itself and split into a number of evenly spaced rings of gas and matter gave rise to the planets' first atmospheres, which eventually condensed to create the Solar System's planets.
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