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The launch of Sputnik I
USSR launches Sputnik 1, man's first artificial satellite -
The launch of Explorer I
USA launches Explorer 1, its first satellite. Discovers Van Allen radiation belts circling Earth -
The launch of Luna 2
USSR's Luna 2 makes hard lunar landing -
Luna 3 Photographs
USSR's Luna 3 takes pictures of dark side of moon -
USSR's Vostok I
Soviet cosmonaut Yuri Gagarin is first man to orbit Earth -
USA 's Friendship 7
American astronaut John Glenn orbits Earth -
USA's Mariner 2
USA's Mariner 2 passes within 21,500 mi. of Venus -
USSR's Voskhod 2
Soviet cosmonaut becomes first man to "walk" in space -
USA's Mariner 4
USA's Mariner 4 takes first close-up photos of Mars -
USSR's Luna 9
USSR's Luna 9 makes first soft landing on moon -
USA's Surveyor I
USA's Surveyor 1 makes soft lunar landing -
USA's Mariner 5
USA's Mariner 5 passes within 6,000 mi. of Venus -
USA's Apollo 11
American astronaut Neil A. Armstrong is first man to walk on the moon, accompanied by Edwin E. Aldrin, Jr