ALBAWABA - Astronomers have spotted a mysterious object from outside our solar system heading toward Earth at high speed. It is expected to pass close to us on December 17. The object, named A11pl3Z, is currently moving at more than 66 kilometers per second (around 241,000 km/h), making it almost unaffected by the gravity of the sun or other planets in our solar system, according to Harvard University physicist Avi ...