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It was the first man-made object to go into space. It remained in orbit until January 4, 1958.
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The dog, Laika, was the first animal to go into space.
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This was the first U.S. satellite to reach orbit. It lifted off at Cape Canaveral. Explorer 1 carried a scientific experiment of James Van Allen and leads to the discovery of Earth's radiation belt.
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Explorer 2 failed to reach orbit.
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It kept functioning for three years.
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N.A.S.A. stands for National Aeronautics and Space Administration.
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Luna 1 was the first man-made object to orbit the sun.
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It passed within 37,000 miles of the Moon before falling into a solar orbit. Pioneer 4 was the first U.S. sun orbiter.
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It impacts the moon on September 13, and became the first man-made object to impact the moon.
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Luna 3 orbitted the moon and photographed 70% of its surface.
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Tiros 1 was also the first successful weather satellite.
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Discoverer XIV is the U.S.'s first camera equipped spy satellite.
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He was the first American in orbit. He actually orbitted the Earth three times.
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Yuri Gagarin becomes the first man in space.
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Mariner 2 flew past Venus and entered a solar orbit.
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Cosmonaut Valentia Tereshkova becomes the first woman in space.
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Ranger 7 transmits the first close-up images of the Moon.
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Cosmonaut Alexei A. Leonov goes outside of his spacecraft, therefore preforming the very first spacewalk.
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Ed White does America's first spacewalk.
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Luna 9 became the first spacecraft to land on the Moon.
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The Lunar Orbiter 1 enters orbit and takes pictures of Earth.
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Venera 4 transmitted data about the atmosphere and surrounding area around Venus.
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Zond 5 went around the Moon and returned to Earth six days later.
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Neil Armstrong became the very first man to walk on the Moon. He was on a U.S. spacescraft.
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Lunokhod 1 was the first robot to be on the Moon. Driven by a five-man team on earth, Lunokhod 1 traveled over surface for 11 days.
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Allan Shepard, who came on the Apollo 14 spacecraft, became the first man to hit a golfball on the moon.
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Pioneer 10 became the first man-made object to go through the asteroid belt.
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It flew past Jupiter in 1974, and Saturn in 1979. It also discovered new rings on Saturn.
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USSR's Salyut 3 remained in orbit until February 2, 1977.
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Viking 2 also discovered water frost.