Remember that asteroid that isn't going to hit Earth? We could send a mission to explore it
YR4, which orbits the sun every four years and periodically crosses Earth's orbit. The nature of its orbit makes it a ...
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NASA Fast Facts
There are 10 major NASA facilities, including the Kennedy Space Center in Florida and the Johnson Space Center in Houston. October 4, 1957 - The Soviets launch Sputnik 1, the world’s first artificial ...