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All about history history of the united states pdf
All about history history of the united states pdf





all about history history of the united states pdf all about history history of the united states pdf

satellite launch consisted largely of German rocket engineers who had once developed ballistic missiles for Nazi Germany. The United States made two failed attempts to launch a satellite into space before succeeding with a rocket that carried a satellite called Explorer on January 31, 1958. Prior to the launch of Sputnik, the United States had been working on its own capability to launch a satellite. This was SputnikII, a satellite that carried a living creature, a dog named Laika.

all about history history of the united states pdf

Then, a month later, on November 3, 1957, the Soviets achieved an even more impressive space venture. technologies that could endanger Americans, the United States grew worried. The radio beeps could be detected on the ground as the satellite passed overhead, so people all around the world knew that it was really in orbit. After reaching space, Sputnik orbited Earth once every 96 minutes. Carried atop an R7 rocket, the Sputnik satellite was able to send out beeps from a radio transmitter. This competition came to a head with the launch of Sputnik. In the U.S.S.R., the rocket designer Sergei Korolev had developed the first ICBM, a rocket called the R7, which would begin the space race. For several years, the two superpowers had been competing to develop missiles, called intercontinental ballistic missiles (ICBMs), to carry nuclear weapons between continents. This happened during the period of political hostility between the Soviet Union and the United States known as the Cold War. We human beings have been venturing into space since October 4, 1957, when the Union of Soviet Socialist Republics (U.S.S.R.) launched Sputnik, the first artificial satellite to orbit Earth.







All about history history of the united states pdf