What is a satellite?

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The artificial satellite is a man-made spacecraft, launched into space and situated around a planet. The scientists' findings on the motion of the planets and gravity were the foundations that gave rise to the launching of artificial satellites. These, like the natives, like the Moon, are attracted to the planet around which they revolve, but do not fall precisely because they revolve. This force, called a centrifuge, is what allows the satellites will not be attracted by the gravitational force on the planet. To place a satellite in orbit is needed to propel ultrapoderosos fuels, and precision instruments to guide it. The man uses these satellites for telecommunications, control of land resources, knowledge of weather and scientific research in general.

Telecommunications satellites orbiting the Earth in 24 hours and can be used constantly. One of the first such satellite was the Telstar, launched in 1962, which was used for a TV link and a number of phone calls.

What were the first releases?

On October 4, 1957 launched the first object: In board Sputnik II carried the first living creature: the dog Laika. The man who started the first space flight was the Soviet Yuri Gagarin, in 1961.

What is using space stations?

They are used by humans during space travel or for scientific research. The first space station was Salyut I, belonging to the Soviet Union, launched in 1971.

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