Radar images from the Arecibo Observatory in Puerto Rico showed that asteroid 2020 BX12 is actually a binary system. In other words, the big space rock is carrying around a smaller asteroid 70 meters (230 feet) in diameter that orbits it like a tiny moon. With a diameter of up to 450 meters (1,476 feet) according to NASA data, the larger of the two asteroids qualifies the system to fit the definition of a potentially hazardous asteroid, which is based solely on its size and vicinity to Earth. It does not, however, mean that 2020 BX12 actually presents a potential...