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Classic Space Launches: The space race is fast and frantic full of dramatic launches.

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As the plane cuts through the air, the air that flows over the top of its wings has to travel a greater distance than the air flowing underneath its wings. So the air has to travel faster over the top than the bottom. Hence the air pressure on the top and bottom of the wings produces an upward force or lift that pushes the wings upwards.

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The function of an earth satellite station is to transmit and receive information frequency through microwave signals of a certain frequency. It has a large parabolic disc aerial. A communication satellite will amplify these microwave signals, convert them to another frequency and transmit them to other earth satellite stations. As the world becomes more sophisticated more modern communication methods and devices are introduced to the market.

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The use of nuclear energy to generate electrical energy is a controversial issue in many countries but over half of the electricity in France is generated by nuclear power stations..People are against the production of nuclear energy because past nuclear – related tragedies still haunt them. The effects caused by nuclear disasters such as Chernobyl and Three Mile Island are still fresh in the minds of most people.

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Four hundred years ago, Galileo was the first person to view the night sky and this was when modern astronomy was born. With the United Nations declaring 2009 as the International Year of Astronomy, take a look at these awesome interactive and animated websites which will give you a little night sky delight.

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Different uses for satellites.