JPL has a searchable database of exoplanets that currently lists the 340 known planets around other stars. None of them is Earth-like, most being gas giants, several orbiting pulsars, and a handful being on the border between planets and stars (the so-called Hot Jupiter model). That may change in the next few weeks with the launch of Kepler, an orbital telescope designed specifically to find habitable planets. It’s about time we get a realistic idea how common potentially life-bearing worlds are, and either meet the neighbors or get ready to move.
