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Uranus is discovered
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Neptune was discovered on September, 23. 1846
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1926-Robert H. Goddard launches first liquid fueled rockets
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1947-First animals launched into space (fruit flies) by the U.S
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Sputnik 1, the first man-made object to orbit the Earth, is launched by the U.S.S.R., and remains in orbit until January 4, 1958.
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Sputnik 2, carrying the dog Laika for 7 days in orbit, is launched by the U.S.S.R., and remains in orbit until April 13, 1958
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1958-1980
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Explorer 1, the first U.S. satellite in orbit, lifts off at Cape Canaveral using a modified ABMA-JPL Jupiter-C rocket. It carries a scientific experiment of James A. Van Allen, and discovers the Earth's radiation belt.
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Explorer 2 is launched by a Jupiter-C rocket, and fails to reach orbit.
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Vanguard 1 satellite is launched into orbit, and continues to transmit for 3 years.
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Sputnik 3 is launched by the U.S.S.R.
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Vostok 1 is launched by the U.S.S.R., carrying Cosmonaut Yuri A. Gargarin, the first man in space. He orbits the Earth once.
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Edward White II makes the first U.S. space walk from Gemini 4. Duration is 22 minutes.
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Neil Armstrong and Edwin Aldrin, Jr. make the first manned soft landing on the Moon, and the first moonwalk, using Apollo 11.
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1981 - Present day
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Venera 13 lands on Venus, and provides the first Venusian soil analysis.
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Soviet Salyut 7 space station is launched.
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Soviet/International Phobos 2 launched, which orbits Mars to study its surface, atmosphere and magnetic field.
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Space Shuttle Atlantis touches down after mission STS-79. It brings back Shannon Lucid, who becomes the longest US astronaut in space, and the longest female astronaut in space.
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Mars Pathfinder becomes the first probe to successfully land on Mars since Viking 2 in 1976. It is also the first planetary probe to include a separate roving robot probe (Sojourner) since the Soviet Union's Luna 21 in 1973.
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Mars Climate Orbiter is launched by NASA, with the objective of studying Martian weather. The probe is lost as it approaches Mars on September 23, 1999, due to an error in propulsion software, using English instead of metric units. The probe passes too close to Mars and burns up in the atmosphere
