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Konstantin Tsiolkovsky realizes that liquid propellants would give rocks the speed to escape Earth's gravity. He develops an equation for escaping Earth's gravity.
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Hermann Julius Oberth wrote about the basic principles of space flight and suggested rocket with stages.
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Robert Goddard conducted the first successful flight of a liquid-propellant rocket.
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Wernher Von Braun's developed the V-2 rocket.
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Pioneer 4 space probe lunched to pass within 37 miles of the moon and then fall into a solar orbit.
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Mercury Friendship 7 lifts off with John H. Glenn, Jr. to orbit the Earth 3 times with the first American to orbit the Earth.
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Neil Armstrong and Edwin Aldrin, Jr. make the first manned soft landing on the moon and are the first to walk on the moon.
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Pioneer 11 launches to fly past Jupiter in 1974 and Saturn in 1979.
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Viking 2 lands on Mars in the Plain of Utopia where it discovered water frost.
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First manned mission of Space Shuttle Columbia launched.
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Venera 13 lands on Venus, and provides the first Venusian soil analysis.
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Space Shuttle Discovery launches and deployes the Edwin P. Hubble Space Telescope.
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Launch of the double probe Cassini/Huygens, aimed at Saturn arriving in 2004.
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The Mars rovers Spirit and Opportunity land on opposite sides of Mars to take images of the surface and preform chemical experiments.
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The International Space Station has been continuously manned for 11 years. This project is a joint effort by 5 participating agencies: the American NASA, the Russian RKA, the Japanese JAXA, the European ESA, and the Canadian CSA.
