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In 1957 the Russians released Sputnic to orbit Earth and study it's layers.
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In 1958 the US released Explorer 1 to measure the cosmic waves of the Earth.
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In 1962 NASA released Mercury, to have a human 'fly' in spce around Earth. (Spaceflight)
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In 1962 the US released Mariner 1 to send a spacecraft to Venus.
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In 1964 the Soviet Union released Zond 2 to fly by Mars, and take pictures.
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In 1966 NASA released Pioneer 7 to measure the sun's magnetic field.
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IN 1984 the Soviet Union, Austria, Bulgaria ex.. released Vega 1 to deliver advanced landers and balloons to Venus
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In 1985 the Europeans realesed Gitto to study comet Halley.
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In 1989 NASA released Voyager 1 and 2 to be the first people to fly by Neptune
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In 1990 the Europens released Uyleses to use Jupiters gravity for a solar orbit.
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In 1995 the Europen Space Agency released Soho to study the solar atmosphere.
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In 1997 NASA released Cassini to fly by Jupiter.
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In 1997 NASA released Huygens to study one of Saturn's moons, Titan.
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In 2003 NASA released Gallieo to study Jupiter's layers.
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In 2011 NASA released Juno to study Jupiter
