With a mas...

With a mass three times larger than Earth’s, the newly discovered world has the muscle to hold atmosphere. Plus, it has the gift of time. Not only is its parent star especially long-lived, the planet is tidally locked to its sun — similar to how the moon keeps the same side pointed at Earth — so that half the world is in perpetual light and the other half in permanent darkness. As a result, temperatures are extremely stable and diverse.

Astronomers think they may have found an earth-like planet that could sustain life sooner than the previously estimated May 2011.