Hot Jupiters, giant planets that circle their stars in just a few days, have long defied simple explanations of how planetary systems grow and evolve. A new tidal “clock” hidden in their orbits is now ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. This image of Pluto was made after the New Horizons spacecraft flew past the dwarf planet on July ...

Astronomers have identified a vast, cotton-candy–light “super‑puff” world that loops around its star in a wildly misaligned orbit, defying the tidy rules that usually govern planetary systems. Instead ...

Hot Jupiters rank among the strangest planets astronomers have ever found. They are gas giants as massive as Jupiter, yet they race around their stars in just a few days. Since the first such world ...

The first exoplanet ever discovered in 1995 was what we now call a “hot Jupiter”, a planet as massive as Jupiter with an orbital period of just a few days. Today, hot Jupiters are thought to have ...

New simulations show red planet affects Milankovitch cycles that shape how solar energy is distributed on Earth over millions ...