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Skydiving from the edge of the world: Space travel
Female1: I mean are so much high than we can comprehend.
Female2: Our common understanding of gravity is base on the general theory of relativity. It was develop when Albert Einstein realize that a man in the emptiness of space would not be able to detect weather he is falling under gravity. Einstein called this a happy idea. But in 1960, 5 years after Einstein death, Joe Kittinger are made the idea, a reality. He was part of a US air force team, studying the effects of high altitude on a human body. He never achieves the fame of Eureka Garry or Neil Armstrong. But all intends and purposes, Joe Kittinger was the first man in space. 3 hours after lift off, his balloon was 30 kilometers above the earth, 3 times higher than a jet airliner, And then carrying a film camera, Kittinger did something amazing, he jumped!
High above the clouds in the incredibly thin air, Kittinger had no sense of falling. He had to look back up but there are seeding balloon. But he was actually accelerating to 900 and 90 kilometers per hour. Only after decelerating in the thicker air lower down, then he open his parachute. Kittinger was the first man to reach the speed of sound without an aircraft. But in this astonishing encounter gravity did him no harm at all.
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