We are seeing sky. It is in the high. How much its length? – No scale to the space.

Space shuttle

A space shuttle is the first re-usable spacecraft made by man. It was developed to provide a re-usable, and therefore cheaper, vehicle for launching satellites and for other work in space. The shuttle is a bulky delta-winged aircraft with powerful rocket motors. At launch, two solid –fuel booster rockets are strapped to its sides, and a giant fuel tank is fixed to its belly. The rockets and fuel tank fall away after launch, and the rockets are recovered and re-used. In orbit, the shuttle’s cargo bay opens to release satellites or allow the crew to work in space. The shuttle lands on a runway like a conventional aircraft.

The benefits of space exploration

Until 1957, human beings were just observers of the solar system. Now they have entered the realm of space and gathered first knowledge of their planetary environment. Twelve men landed on the moon, set up data gathering experiments on the lunar surface, and brought back lunar rocks and soil for study and analysis. The hidden side of the moon and the planets mercury, Venus, Mars, Jupiter, and Saturn have been photographed and studied. The earth and its weather have been studied, and communication relays and navigational aids have been established.

Space satellites

More useful form the satellites foe communications. Nowadays communication is most important and necessary. Internet is working from this line.

Space satellites have revolutionized communications, making possible everyday developments such as mobile phones and television. Communication satellites receive signals beamed at them from the earth, and send them on to other places. They transmit television and telephone signals around the world, even to remote areas. They are also used for defense communications, including checking on the movement of military forces. Satellites can survey the earth’s surface, predict weather changes and track hurricanes. They can also help to explore resources such as crops, forests and even minerals.

*At takeoff the space shuttle weights 2,000 tones. It burns almost all of its fuel in the first few minutes after launch, and then continues to coast into its orbit 300 km about the surface of the earth.