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.

From the fall of an apple to the glow of the farthest known star, gravity quietly choreographs almost everything that happens ...

Scientists pushed photons across the universe to test the speed of light—and found Einstein’s cosmic speed limit still holds ...

Two researchers have found an explanation for why we find almost no exoplanets orbiting binary stars. According to them, ...

In 1905, Albert Einstein revolutionized physics by demonstrating that time is not absolute but relative to the observer's motion. He showed that space and time are intertwined into a single fabric ...

Astronomers have found thousands of exoplanets around single stars, but few around binary stars—even though both types of stars are equally common. Physicists can now explain the dearth.

Time feels like the most basic feature of reality. Seconds tick, days pass and everything from planetary motion to human memory seems to unfold along a single, irreversible direction. We are born and ...