NASA's Spitzer telescope confirms a new neighbor in the form of a larger-than-Earth rocky planet outside our solar system.
There's reason to believe that other planets might be better for supporting life as we know it, and they might not even be that far off, cosmically speaking.
Rallying back from a mechanical failure, the telescope helps confirm the existence of an exoplanet 2.5 times the diameter of Planet Earth.
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.
NASA's Kepler mission helps locate a solar system stocked with Earth-sized planets that dates back 11.2 billion years.
Among eight new Kepler planets found are the two most Earth-like to date, with possible conditions for the propagation of life.
Venus exploration has been deemed off-limits due to its inhospitable climate -- but NASA believes Cloud City may be the answer.
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.