The Kepler space observatory says there should be about 8.8 billion potentially habitable planets in the Milky Way. That has big implications for the search for life, and much more. Share on Facebook ...

If it’s too close, Kepler 69c would be too hot for liquid water to exist on its surface. If it’s too far from its sun, well, then it would be nothing more but a frigid world. What we do know is that ...