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NASA tested a nuclear rocket engine dozens of times in the 1960s, proved it could work, then shelved it before it ever flew — and now the same basic idea is being revived because it could make the trip to Mars far shorter than chemical rockets allow.
Keyword: Rocket Engine
In the 1960s, NASA and the Atomic Energy Commission built nuclear rocket engines and test-fired them dozens of times in the Nevada desert. The engines worked. Then the program was shelved before a si… [+5327 chars]
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