Astronomer : There may be Thousands Earth-like planets in the the Milky Way . It may be rocky and covered in lava . If any of them have liquid water , they are likely to have some type of life , he says . Analysis : 100 billion of intelligent civilizations may have emerged in the Milky Way . Kepler 's NASA mission to search for habitable planets in our corner of the galaxy .
Astronomer : There may be Thousands Earth-like planets in the the Milky Way . If any of them have liquid water , they are likely to have some type of life , he says . Analysis : 100 billion of intelligent civilizations may have emerged in the Milky Way . Kepler 's NASA mission to search for habitable planets in our corner of the galaxy .