by Kerry Sheridan MIAMI, United States (AFP) —  NASA announced Tuesday the discovery of 1,284 new planets outside our solar system, more than doubling the number of exoplanets found with the Kepler space telescope. “This gives us hope that somewhere out there, around a star much like ours, we can eventually discover another Earth,” said Ellen Stofan, chief scientist at NASA headquarters in Washington. The unmanned Kepler space observatory, which launched in 2009, […]