Kepler-22b, the planet most resembling the Earth is discovered circling a star 600 light years away. Scientists view it as a key finding in an ongoing quest to learn if life exists beyond Earth.

Earth is the only life-supporting planet in our Solar System. Until now. Today, we're bringing Kepler 22-b into our planetary ...

The Kepler mission has confirmed its first potentially habitable world, a planet 600 light-years from Earth in a 289-day orbit around a smaller, cooler version of our sun. The planet is a "super-Earth ...

This week astronomers have announced the existence of a planet discovered to be in human livable range of star not unlike our sun, with a size 2.4 times that of our Earth and a temperature of ...

Eric Mack has been a CNET contributor since 2011. Eric and his family live 100% energy and water independent on his off-grid compound in the New Mexico desert. Eric uses his passion for writing about ...