One such mystery, described in a recent paper in The Astrophysical Journal Letters, concerns circumbinary exoplanets—or rather, the shortage thereof—in the now 6,000+ exoplanets confirmed to date.

Add Yahoo as a preferred source to see more of our stories on Google. An artist's rendering of Kepler 16-b and its two suns. A rocket launch. Our nearest stellar neighbor. A Netflix show. All of these ...

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 ...

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 ...