
Space is what we see up in the sky. We see stars, planets and a vast expanse of empty space in between them. There are billions of stars and galaxies in the space beyond our planet earth. The expense of space is so vast that even billions of stars, mostly much larger that the sun cannot illuminate it. So it is so vast dark a cold. Space is said to begin about 160 km (100 miles) above the earth. As well as being cold dark it is also silent and airless. It is thus a hostile environment. In the dark space only stars shine.
Space is subjected to extreme heat and cold and is crises – crossed by belts of dangerous radiations. Since early civilizations man has tried to understand – what the space is all about? How the planet earth fits into the space and into the rest of the universe that lies beyond? Early astronomers tried to explain the movements of stars and planets in the space. Today with the help of the most sophisticated technology available the man is able to tell what lies in the space. This technology also helps the man pressure his quest further.
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