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Sputnik 1 was an unmanned mission launched to mars.
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Sputnik 2 followed Sputnik 1, but this time, it carried a dog into orbit for 7 days.
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The first successful satellite, Explorer 1, was launched into orbit.
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Explorer 2 was launched but failed to make it into orbit.
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The first successful manned mission carried Yuri Gagarin aboard the spacecraft Vostok 1. He orbited around the earth for 1 hour and 48 minutes.
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Alan Shepard completed a sub orbital flight one month after Russia.
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The Apollo 1 crew was running a sumulation flight when the space craft caught fire, killing all of its crew members.
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Apollo 11 was part of many Apollo missions. This mission is the most famous because Neil Armstrong stepped foot on the moon and was the first man to walk on the moon.
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The reusable space shuttle allowed even greater possibilities to go back into space without rebuilding the whole shuttle.
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Sally Ride was the first woman to go into space on the shuttle mission STS-7.
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The Space Shuttle Challenger exploded 73 seconds after take off, killing all its crew members.
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The Mir space station was the first long term space station to be inhabited.
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The Mars Pathfinder allowed scientist to collect samples and further explore Mars.
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The ISS was launched to replace Mir and enable scientist to expand the space station.
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Space Shuttle Columbia Explodes upon entering into the atomosphere. The explosion killed all of its crew members.
