As you know, space research spending huge amounts of money. For what? Because space flight is associated with high costs, difficulties and dangers. But they are necessary, because thanks to them, humanity makes many important scientific and practical discoveries. For example, dense and opaque atmosphere of our planet does not allow scientists to see distinctly the stars from the Earth. So they dream to build an Observatory in space, where there is no air and nothing prevents you from studying stars without interference. Until such observatories no, stars are studying the astronauts during the flight, monitor the state of the Sun.
And even fly above the Earth satellites. Many benefits they bring to man. For example, flying over the station in a communications satellite. Starts the transfer, and the TV station transmits a "picture" of the satellite, and the like in the relay transmits it to another satellite, which flies on another spot on the globe. Second satellite transmits the third image, which returns an image again on the Ground, on a television station located thousands of miles from the first. Thus, the program can be viewed at the same time the residents of Moscow and new York.
Satellites also monitor the weather. Flying the satellite is high, all the storms, storms, storms, all atmospheric disturbances notices and passes on the Ground. And on Earth forecasters information process and know what the weather is expected tomorrow or the day after.
There are also satellites scouts. They photographed the Earth, and geologists from photographs to determine where our planet, there are rich deposits of oil, gas, and other minerals.
Why manned space flight?