Question

what is atmosphere???​

Answer 1

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

Explanation:

Thanks for Points!

Answer 2

$\huge\color{pink}\boxed{\colorbox{Black}{❥ Answer}}$

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.