How Thick Is The Atmosphere?

There is no specific periphery that determines the boundary to earth's atmosphere. The earth's atmosphere is noticeable at a range of 120 Km during re entry. However, it is most dense at a distance of about 11 Km above earth's surface, estimated to be three quarters as dense than at the periphery of earth's atmosphere. It consists of a mixture of 78 % Nitrogen, 21 % Oxygen and the rest is composed of trace amounts of other gases and water vapor.

There is no specific periphery that determines the boundary to earth's atmosphere. The earth's atmosphere is noticeable at a range of 120 Km during re entry. However, it is most dense at a distance of about 11 Km above earth's surface, estimated to be three quarters as dense than at the periphery of earth's atmosphere. It consists of a mixture of 78 % Nitrogen, 21 % Oxygen and the rest is composed of trace amounts of other gases and water vapor.