New observations by NASA’s Goldstone Solar System Radar in California, Arecibo Observatory in Puerto Rico and the Green Bank Observatory in West Virginia have revealed that the recently-discovered near-Earth asteroid 2017 YE5 is actually two objects — each about 3,000 feet (900 m) in size — orbiting each other. 2017 YE5 is only the fourth binary near-Earth asteroid ever observed in which the two bodies are roughly the same size, and...
