An enormous 'potentially hazardous' asteroid bigger than the Space Needle the size of the Eiffel Tower will zip past Earth safely on Tuesday at a distance of roughly 4.5 million miles, NASA JPL said. The space rock 2021 KT1 has a diameter between 492 and 1,082 feet, according to NASA. At the mid-point of 787ft, the near-Earth object (NEO) is smaller than the size of the Eiffel Tower (1,063ft at ...