NASA's Kepler discovers more than 104 new exoplanets

An international team of researchers announced the discovery of 104 new planets outside our solar system, including four that could have Earth-like, rocky surfaces. Scientists discovered the exoplanets using the Kepler space telescope as well as ground observations by Earth-based telescopes, including four on the summit of Mauna Kea in Hawaii. The $600 million Kepler mission has allowed scientists to discover more than 4,600 planets -- 2,326 of them confirmed -- since it launched in 2009.