Space Exploration By amarsh16 Oct 4, 1957 Sputnik 1 Sputnik 1 was the first aartifical satellite in space. Period: Oct 4, 1957 to Oct 6, 2011 Space Exploration Oct 6, 1960 Project Mercury Project Mercury was the first step to reaching the moon. May 5, 1961 Alan B. Sheparad Alan B. Shepard was the first U.S. citizen in space. Oct 6, 1961 Yuri A. Gagarin Yuri was the first human in space. He was a Soviet Cosmonaut. Oct 6, 1962 John Glenn John Glenn was the first U.S. citizen to orbit Earth. Mar 6, 1965 Project Gemini Project Gemini was the second step to reaching the moon. Oct 6, 1966 Surveyor Surveyor landed on Earth's moon, proving it could support space craft and humans. Jul 20, 1969 Project Apollo Apollo 11 landed on the moon. Niel Armstrong was the first human on the moon. His first words on the surface were, "That's one small step for man, one giant leap for mankind." Oct 6, 1973 Skylab The U.S. lauched space station Skylab. Skylab fell out of orbit in 1979. Oct 6, 1989 Galileo Space probe Galileo was lauched and reached Jupiter in 1995. Oct 6, 1997 Cassini NASA lauched space probe Cassini. Cassini is on its way to Saturn where it will explore.