Mercury doesn't give up its secrets easily. The smallest planet in our solar system is also one of the most extreme—a sun-scorched, metal-rich world with a puzzling magnetic field and lavas unlike ...

Astronomers have made an unexpected discovery about the planet TOI-3884b, which orbits its star at a crazy angle. The planet’s orbit is tilted by around 62 degrees compared to the star’s rotation, and ...

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 ...

A strange 200 million-year-old object with the mass of a planet has been discovered 20 light-years from Earth, outside our solar system. The "rogue," as it's referred to by researchers, is producing ...

Venus is often called Earth's evil twin due to its size, mass, material composition, and density. It even feels like Venus should've become a second Earth. However, it ended up being one of the ...

A planet circling at a sharp 90-degree angle to the orbits of its two host stars has now been confirmed. This discovery challenges long-standing ideas about how planets form and orbit in the cosmos.

Astronomers have identified a strange new kind of exoplanet that challenges how scientists classify worlds beyond our Solar System. The planet, L 98-59 d, appears to contain a vast ocean of molten ...

A thick layer of haze around the ultra-low-density planet Kepler-51d likely obscures not only the strange planet's composition, but also its origin, according to a new study. A team led by Penn State ...