The three-body problem is a centuries-old physics question that puzzled Isaac Newton. It describes the orbits of three bodies, like planets or stars, trapped in each other's gravity. The problem is ...

The roughly four-billion-year-old system consists of a black hole and two orbiting stars—a configuration that's never been seen before. Reading time 3 minutes Physicists from MIT and Caltech have ...

Take a glance at our solar system and beyond, and outer space seems pretty orderly. Our eight planets travel around the Sun with apparent predictability and even the stars themselves appear to march ...