Jupiter’s moon Io is the most volcanically active place in the solar system. Let me tell you just how volcanic it is.

Astronomers are closing in on one of the most tantalizing possibilities in planetary science, evidence that a previously unknown world may be lurking in the outer reaches of the solar system. The ...

Astronomers have discovered the earliest seeds of rocky planets forming in the gas around a baby sun-like star, providing a precious peek into the dawn of our own solar system. It’s an unprecedented ...

Planetary scientists have long debated where the material that formed Earth comes from. Despite its location in the inner ...

Scientists say a nearby red dwarf star hosts a planetary lineup that looks like a mirror image of our own solar system, with rocky worlds bookending a pair of gas-rich planets. Around the star LHS ...

The planet Mercury is the closest planet to the sun, and also the most difficult for spacecraft to visit and explore. This is ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. An object has been discovered orbiting the sun far beyond ...

Our solar system is a smashing success. A new study suggests that from its earliest period — even before the last of its nebular gas had been consumed — Earth’s solar system and its planets looked ...

Typically astronomers find planets of similar ages to the ones in our solar system, but that’s starting to change. In a study ...