Timeline: 1951-1960

Date Event
Oct.4,

1957

The first ever satellite to be launched into space by humans was the ?i>Sputnik1?by the Soviet Union in the October of 1957. Sputnik 1’s purpose was to take readings of cosmic rays, Earth’s atmosphere and other aspects of space then radioing the data back to Earth. Sputnik disintegrated in the atmosphere 57 days after launch.
Nov.3,

1957

The second satellite sent into space was Sputnik 2, launched also by the USSR. The difference between Sputnik variant two was that it contained a passenger; a small dog named Laika who was put to sleep several days later after this spacecraft performed (the first) biomedical measurements in space. The satellite was destroyed when it fell back to Earth after spending a total of 162 days in space.
Jan.31, 1958 Whilst Sputnik 2 was still in orbit, the United States launched their first spacecraft, ?i>Explorer 1? which transmitted readings of cosmic rays and micrometeoroids for a total of 112 days. Its data led to the discovery of the ‘Van Allen? belts surrounding the Earth.
Mar.17, 1958 The United States launched their second satellite; the Vanguard 2 which was solar powered and last almost six years transmitting signals. A study of its orbit revealed that the Earth is not exactly round, but slightly pear shaped.
May.28, 1958 The USA launched a squirrel monkey in the nose of a Jupiter rocket from Cape Canaveral but it was failed to be recovered at sea.
1958 The first attempts by the USA and USSR at sending probes to the moon fails.
Sep.12,

1959

The USSR makes the first successful moon shot with the probe ?i>Luna 2.?It crash lands in the edge of ‘Mare Imbirum?and deposits a little sphere with the Soviet emblem on the surface.
Dec.4, 1959 A monkey called Sam flew in a prototype Mercury capsule from the Wallops Flight Facility off Virgina. In its 11 minutes flight it reached an altitude of 85 km and was successfully recovered.
Aug.19, 1960 By this time the USSR were ready to carry out orbital tests with animals on their new Vostok spacecraft, launching two dogs, Belka and Strelka into orbit. Along with the dogs there were two rats, 28 mice and numerous insect, plant and seed specimens. Following the orbiting of the Earth 18 times which spanned approximately a day, the re-entry capsule was successfully recovered on Earth; the animals were alive and healthy. This marked the first successful ‘live?recovery in space history.
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