The planets in the habitable zone orbiting a star may be suitable for liquid water and supporting life.
You may think this planet is overpopulated or you may just be sick of the partisan politics. In either case, HD 40307g is an attractive getaway.
A dwarf planet out beyond Pluto has been found orbiting our sun — and there may be another planet 10 times the size of Earth.
While the Kepler planet-hunting spacecraft is offline, astronomers continue parsing its data and scanning the sky not just for evidence of habitable planets, but for advanced civilizations.
Space and science fiction illustrator Ron Miller has created magnificent images of how Earth's skies would appear if our planet had giant rings.
The question "Is anybody out there?" grows more tantalizing with the discovery of each new far-off planet. CBS Sunday Morning talks to scientists searching for clues.
The agency's Kepler space telescope locates three planets -- in two new planetary systems -- that are the right distance from their suns to make them potentially life-supporting.
When we weren't playing ancient Egyptian Dungeons & Dragons this week, we were celebrating the discovery of Superman's home planet in our cozy Tribble slippers.
Jill Tarter, who was the inspiration for Jodie Foster's character in "Contact," will lead the SETI Institute's fundraising. She talked to CNET about the alien hunt, and what she'd say to them.
Astronomers at the ESO in Europe conclude that there are tens of billions of rocky planets in potentially habitable zones in our galaxy.