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Satellites Physics Coursework

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Introduction

Satellites

Question 1:

The first artificial satellite was launched on the 4th of October 19 57 by the Soviet Union, its name was the Sputnik 1 and its launch sparked the “Space Race” as other countries now felt under pressure to launch there own satellites. It was used to measure the upper atmospheric layer’s density but also helped in monitoring radio signals in the ionosphere. After the launch of Sputnik 1 there were many other launches following shortly after that, the USA following closely to their rivals, as the launch was during the Cold War.

Question 2:

There are many artificial satellites in orbit around both the Earth and the Moon, but one of the more famous ones is the Syncom 3, launched on August 19th 1964, it is better known

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Middle

Question 3:

Firstly geostationary orbits, geostationary orbits are when a satellite is placed on the equator with latitude 0 degrees, and orbit at the equal speed of the Earths rotation. So from the Earth it looks like the satellite remains in the same place, and does not move, the only thing that differs between geostationary satellites is there longitude. Geostationary satellites would be used for things like television and radio transmitting. Where as with a polar orbit it is quite the opposite, polar orbiting satellites are at an inclination of 90 degrees from the equator, and have an orbital period of around 100 minutes. They pass very close the both the poles, hence the name “polar orbit”. These satellites would be used for mapping the weather and

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Conclusion

Bibliography:

www.wikipedia.com

www.nasa.gov/worldbook/artificial_satellites_worldbook.html

http://www.daviddarling.info/encyclopedia/G/geostationary_orbit.html

http://www.centennialofflight.gov/essay/Dictionary/POLAR_ORBIT/DI154.htm

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