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The air in the thermosphere is very thin because of it's high altitude.
Efficiency. A jet engine works best in thin air.
Mars is thin
The thermosphere and the stratosphere are two atmospheric layers that can have warm air.
STRATOSPHERE
thick layer
Stratosphere
The earth's stratosphere is about 32 km thick.
mesosphere
The air in the thermosphere is very thin because of it's high altitude.
Efficiency. A jet engine works best in thin air.
It is likely limitations of the aircraft. Most aircraft are not capable of producing that much lift, especially in the thin air of the stratosphere. Not only that, but there is not enough thrust for a commercial aircraft to get up through that thin air. There are exceptions though. The SR-71 and other "X" planes (X-15), do fly into the stratosphere.
The air gets to thin because their is not enough oxygen.
The current MacBook Air is a wedge shape that is 0.11 inch at the thin end and 0.68 inch at the thick end.
This layer is about 10-50 kilometers up in the air. The stratosphere is 32 kilometers or 19.88 miles think. I think, Im not sure
A thin atmosphere is thin and a thick atmosphere is thick
A thin atmosphere is thin and a thick atmosphere is thick