Question

What is atmosphere ?

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Answer 1

The circle of gas and other substances located around a planet is called atmosphere. Atmosphere remains 'affixed' to the planet due to the gravitational attraction of the planet.

Answer 2

Answer:

An atmosphere is a layer of gas or layers of gases that envelope a planet, and is held in place by the gravity of the planetary body. A planet retains an atmosphere when the gravity is great and the temperature of the atmosphere is low.