Asteroid, meteorite hit show Earth is not protected February 16, 2013
Space station to add inflatable module January 16, 2013
The Buzz: Silent running January 8, 2013
It doesn't mean all are potentially habitable, but the sheer number of Earth-size planets is a welcome starting point in the search for worlds like our own.
Scientists have yet to find a twin Earth -- one that's not only the right size but also located in the so-called Goldilocks zone, a place that's not too hot and not too cold where water might exist in liquid form.
Two independent groups came up with the new estimate after a fresh analysis of data gathered by NASA's Kepler spacecraft, which was launched in 2009. One team was from the Harvard-Smithsonian Center for Astrophysics; the other from the University of California, Berkeley and University of Hawaii.
More Nation & World Headlines
World leaders gather to try to save Earth from overheating 1:33 p.m. Rubio: Radical jihadists using refugee crisis as cover 1:39 p.m. McCarthy predicts no gov’t shutdown over Planned Parenthood 1:35 p.m. Feds say U of Chicago threat a response to police shooting 1:34 p.m. Bond set at $1.5M for Chicago officer who fatally shot teen 1:31 p.m. House may move quickly to overhaul visa waiver program 1:33 p.m. Candy, the other Carson with gifted hands 1:31 p.m. Police: Suspect in officer’s death refused to drop rifle 1:38 p.m.
Our new comment system is not supported in IE 7. Please upgrade your browser here.