An asteroid dubbed "potentially hazardous" by space agency NASA will come incredibly close to Earth next week, NASA's asteroid trackers have confirmed. "Potentially hazardous asteroids are about 150 meters (almost 500ft), roughly twice as big as the Statue of Liberty is tall. Potentially hazardous comets also get unusually close to Earth," NASA said. According to The Daily Express, knowing the size, shape, mass, composition and structure of these objects helps ...