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also called rocket motors, have been used since the 1200s to launch fireworks and small military rockets.
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in 1926, Robert Goddard, "the farther of Modern Rocketry"invented the liquid-fuel rocket.
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also called rocket engines,use various combinations of liquid chemicals that expand greatly when they react with each other.
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he built V-2 bllistic missile,one of the first modern rockets.
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The space age began on october 4, 1957, when the stoviet Union launched sputnik 1, Less than a month later, a dog named Laika was launched aboard the 1100-pound satellite spuntnik 2, becoming the firs living creature to orbit the earth.
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Although smaller than the Sovoet satelites, Explorer 1 carried scientific instrument that led to a major discovery, the discovery of the Van Allen radiation belts, large regions of solar wind particles trapped in the magnetosphere.
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On April 12, 1961,Soviet cosmonaut(astronaut)Yuri Gagarinbecame the first person to travel in space when he made a single orbit arround the earth in his Vostoc 1 spacecraft.
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Alan shepard,On May 5, one month after Gagarin orbited the earth, Alan Sheperd became America's first person in space with fifteen-minute suborbital hop in the Freedom 7 Mercury spacecraft.
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In 1962 in the friendship 7 mercury space-craft became the first American to orbit earth.
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in 1963 Valentina Tereshkova the pilot of Vostok 6, became the first woman to fly in space.
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With the Apollo program, America finally took the lead in the space race.
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the larger IB rocket is Saturn V.
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People could live and work for months at a time
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Although Salyut space stations were succeessfully operated.
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The United Sataes launched its first space station, in 1973.
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On April 121981, the United launched the space shuttle Columbia, a new type of spacecraft.
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The soviet Union lauched the Soviet Uniot launched the sace station Mir in 1986.
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Became the first human being to set foot on another world.
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By 2000, over fifteen nations were working togethet to build what is now called the International Space Station.
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With the retirentment of the space shutte, the russioan soyuz spacecraft.
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Chinese astronaut Yang Liwei orbited the earth 14 times in his shenshou 5 spacecraft.
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An EVA, or Extra Vehicular Activity , is any activity performed by an astronout outside a sapacecraft; EVA's are sometimetimes called space walks.
