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Period: to
Space Exploration
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Sputnik 1
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. -
Alan B. Shepard
He became the first U.S citizen in space. -
Yuri A. Gagarin
He was a Soviet cosmonaut, first one in space. He orbited Earth and returned safely. -
Mariner 2
It explored Venus's atmosphere -
John Glenn
He became the first U.S citizen in project Mercury to orbit Earth. -
Project Apollo, Apollo 11
Final stage of the program to reach the moon. Apollo 11 landed on the moon. -
Neil Armstrong
He was the first human to set foot on the moon along with Edwin Aldrin and Michael Collins. -
Pioneer 10
sent back photos of Jupiter, it was the first space probe to encounter an outer planet -
Viking 1
It was an orbiter that mapped the surface of Mars; lander searched life on Mars -
Magellan
Mapped Venus's surfaced and returned data on the composistion of Venus's atmosphere. -
Terra
Satellite took false-colored images of spring growth, sea suface temperature, carbon monoxied concentrations, and reflected sunlight among others.