Gliese 832 c, located 16 light years away in the constellation of Grus, is among the closest most habitable exoplanets to Earth. Though it is two times larger than our planet, Gliese 832 c is also regarded as one of the most Earth-like alien bodies. In this out-of-this-world edition of Hybrid Librarian, check out nine other exoplanets that may one day sustain mankind and life as we know it.