Rare asteroid duo dances in the stars

Finding a life partner, someone to spend your days with while you circle the sun, is hard. Now scientists have discovered a rare perfect match: Asteroid 2017 YE5, originally thought to be solo, is actually a double asteroid. Two asteroids, each approximately 800 meters (almost half a mile) in diameter, are orbiting each other about once a day, as they orbit the sun together. Scientists do not know how long the two have been together.