A young star called V1298 Tau is giving astronomers a front-row seat to the birth of the galaxy’s most common planets. Four ...

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.

Although Mercury was geologically active in its early days, today its surface appears almost completely static. This is why ...

A newly identified Earth-sized exoplanet with a year-long orbit may lie near its star’s habitable zone, but extreme cold could limit its chances of hosting liquid water.

These icy bodies orbit the sun just like the major planets, yet they follow their own rules, often traveling along elongated ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. There’ s six-planet parade on Monday, Aug. 25, just before ...

Scientists find that deep molten rock can power long-lasting magnetic fields, helping large rocky planets hold onto their ...