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Question : Can a airplane go past the exosphere? Samuel   Answer : Hi Samuel, The exosphere is exosphere the uppermost layer of the atmosphere. It begins at about 700 km or 435 miles up and fades off into the vacuum of space. The gases up there are extremely thin and there is not much oxygen, mostly hydrogen. You sure wouldn't be able to survive there without special equipment. Conventional aircraft, like piston-engine or jet, are unable to travel to the exospehere. Special aircraft such as the X-15 rocketplane, the Space Shuttle and SpaceShipOne are designed to fly that high and beyond. Steve Buss EAA Young Eagles   Was this answer useful to you? Back

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