In 1960, all astronauts were men. Women weren't allowed to fly jets in the army, and during that time having experience as a jet pilot was a requirement for astronauts.
WATCH: Live out your astronaut dreams in this space-themed hotel
Only in 1983 were women sent into space.
Watch the video above for more information on the Mercury 13, the group of women who opened the door for women astronauts.
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