WASHINGTON, United States (AFP) — An international team of researchers announced Monday 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 […]