Kepler Scientist: 'Galaxy is Rich in Earth-Like Planets'

A Kepler co-investigator has preempted the official announcement and leaked that the exoplanet-hunting space telescope has discovered about 140 Earth-like candidate worlds orbiting other stars.

July 26, 2010
5:28 PM EDT
A screen grab from Dimitar Sasselov's TED presentation. Note the bar labeled "like Earth."