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- Space exploration (14877 bytes)
1: ...on the moon in the [[space race]] between the [[United States]] and the [[Soviet Union]].
4: ...that would be done. During the [[20th century]], with the development of adequate propulsion technolog...
10: ==Orbiting and reaching space==
11: .... The United States sometimes uses a 50 mile definition. (See [[boundary to space]].)
13: ...n orbit on [[November 3]], [[1957]]. The first orbital flight made by a human being was [[Vostok 1]], ...
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