What sphere separates the remainder of the atmosphere from space and is 6,200 miles thick?

The exosphere is the outermost layer of our atmosphere. Very little air exists in the exosphere; in many respects, it resembles the airless nothingness of outer space. In fact, many scientists disagree with the notion that the exosphere is a layer of the atmosphere and consider it as part of outer space.

Asked by Vasilii Kulev · Last updated 3 years ago · 614 views · SOURCE