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Sputnik 1
The first artificial earth satellite launched by the Soviets into a low earth orbit on October 4, 1957. It was 23 inches in diameter and made of polished metal with four antennas on the outside to broadcast radio pulses. https://www.google.com/search?q=sputnik+1&oq=Sputnik+1&aqs=chrome.0.0l6.3376j0j7&sourceid=chrome&ie=UTF-8&surl=1&safe=active&ssui=on# -
Laika The Space Dog
The first animal let alone the first living thing to orbit the earth, the dog was launched into orbit on November 3, 1957 in the Sputnik 2. https://en.wikipedia.org/wiki/Laika -
Explorer 1
The first successful satellite launched by the United States on January 31, 1958 as a response to the Sputnik launched by the Soviets. https://www.google.com/search?ei=vVbnWuOyLeHn_QbNsJ7ACw&q=explorer+1&oq=explorer+1&gs_l=psy-ab.3..0i131i67k1j0l4j0i67k1j0l4.63082.67230.0.67326.21.15.0.2.2.0.169.1141.13j1.15.0....0...1c.1.64.psy-ab..8.12.864.0..46j0i22i30k1j0i131k1j0i46k1j0i131i46k1j46i131k1.63.VCyC5JEewnQ&surl=1&safe=active&ssui=on# -
Yuri Gargarin
He was an soviet pilot and cosmonaut that was the first human to enter into space. He went in his spacecraft the Vostok and completed a orbit around the earth April 12, 1961. Yuri became famous and earned many awards. https://en.wikipedia.org/wiki/Yuri_Gagarin -
Alan Shepard
He was an American astronaut, naval aviator, test pilot, and business man. Alan was the first American to enter into outer space. https://en.wikipedia.org/wiki/Alan_Shepard -
John Glenn
He was a marine corps aviator, engineer, astronaut, and United States Senator of Ohio. John was the first American to orbit the earth, he circled it three times. https://en.wikipedia.org/wiki/John_Glenn -
Spacewalk
The first person to ever go on a spacewalk was a Russian man named Alexei Leonov on March 18, 1965. The walk was about 10 minutes long. https://en.wikipedia.org/wiki/Alexey_Leonov -
Spacecraft Rendezvous
The first successful rendezvous in space was accomplished by Wally Schirra on December 15, 1965. A Space Rendezvous is an orbital maneuver during which two spacecrafts come to the same orbit and are very close in distance. https://en.wikipedia.org/wiki/Space_rendezvous -
Apollo 1
The first manned mission of the United States Apollo program starting on February 21, 1967. The goal of it was to have a lunar landing. https://en.wikipedia.org/wiki/Apollo_1 -
Apollo 8
The second manned spaceflight mission in the Apollo Space program, it began on December 21, 1968. It became the first manned spacecraft to leave the orbit, reach the moon, orbit it and return back safely. https://en.wikipedia.org/wiki/Apollo_8 -
Apollo 11
The spaceflight that landed the first two humans on the moon. (Neil Armstrong, Buzz Aldrin) The spacecraft landed on July 20, 1969 . https://en.wikipedia.org/wiki/Apollo_11 -
Unmanned Landings on The Moon
There have been many unmanned landing attempts on the moon, but the first successful unmanned landing was by the Soviets using the Luna 16 probe on Sep 24, 1970.
https://en.wikipedia.org/wiki/Moon_landing