The closest layer of the atmosphere is called the Troposphere which extends up to about 7.5 miles into the atmosphere. The next layer is called the Stratosphere which extends from approximately 7.5 miles to 21.1 miles into the atmosphere. The next layer is called the Mesosphere which extends from from 21 miles to 49.7 miles up and the final level is the Thermosphere goes from 49.7 miles up to 195.6 miles into the atmosphere.
