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The former Soviet Union used a rocket to send it into space. It was the first artificial satellite. It orbited earth 57 days before gravity pulled it back to earth.
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He became the first U.S citizen in space.
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He was a Soviet cosmonaut, first one in space. He orbited Earth and returned safely.
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It explored Venus's atmosphere
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He became the first U.S citizen in project Mercury to orbit Earth.
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Final stage of the program to reach the moon. Apollo 11 landed on the moon.
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He was the first human to set foot on the moon along with Edwin Aldrin and Michael Collins.
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sent back photos of Jupiter, it was the first space probe to encounter an outer planet
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It was an orbiter that mapped the surface of Mars; lander searched life on Mars
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Mapped Venus's surfaced and returned data on the composistion of Venus's atmosphere.
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Satellite took false-colored images of spring growth, sea suface temperature, carbon monoxied concentrations, and reflected sunlight among others.