A planet "on replacement" or as searches of the second Earth are conducted

The earth while remains the only known manned world. But the situation can change, considering as actively scientists look for similar planets. In recent years they managed to confirm existence of a set of the second Lands. Whether the first attempts of search of the second Earth Found ekzoplanety It will be possible to visit the second Earth Fantasts regularly address to a life subject on other planets. The scientific world this question also interests. At the beginning of the last century experts confirmed existence of the stars similar to the sun. But with search of planetary systems there were problems. Long time of technologies not...