A mysterious object once believed to be a simple space rock passing Earth is accelerating, and scientists cannot explain why. A new study by researchers at the Georgia Institute of Technology has determined that 1998 KY26, a suspected near-Earth asteroid, is speeding up in a way that the gravity of the sun and planets cannot account for. Simply put, the alleged space rock has something else powering it as it moves around our solar system. Near-Earth objects are rocky space bodies that orbit the sun and sometimes come relatively close to Earth. This object is roughly 36 feet in length,...