Curious about where to go next? The Habitable Exoplanets Catalog is a project to grade and rank the planets outside of our solar system which offer the most livable conditions, were humanity to ponder a move.
At right is a rendering of sunrise on one of the planets in the Gliese 581 planetary system, a top contender. As of now, there are 6 confirmed potentially habitable planets, 27 unconfirmed potentially habitable planets, and 30 predicted potentially habitable moons:
The exoplanets Gliese 581 d, HD 85512 b, Kepler-22 b, Gliese 667C c, Gliese 581 g, and now Gliese 163 c are the only current six planets that are considered potentially habitable or object of interest for the search of extraterrestrial life (image above). The image shows these objects approximately to scale and compared with Earth and Mars. They also are ranked with the Earth Similarity Index, or ESI (number below the names).