Jupiter, the giant of our Solar System, remains one of the most fascinating and mysterious planets to explore. With its ...

Io is the most volcanically active body in our solar system, as a result of gravitational squeezing from the planet. NASA image of Io, Jupiter's third-largest moon.

Volcanic planets with static crusts, called Ignan Earths, can maintain liquid oceans and temperate climates favorable to life.

NASA spotted something moving in one of the moons of Jupiter. Some natural satellites have similar structures to the Earth, and this one is very intriguing.

"This is a terrestrial planet that I would describe as Io on steroids," Kane said. "It's been forced into a situation where it's constantly exploding with volcanoes.

The exoplanet, which is a super-Earth" 30% larger than our own Earth, orbits its star HD 104067 every 2.2 days at a distance of 4.57 million kilometers (2.8 million miles).It is joined by two ...

Recent flybys of the fiery world refute a leading theory of its inner structure—and reveal how little is understood about geologically active moons.

It spent eight years orbiting the planet and its moons, photographing Io in 2001. Galileo eventually made a controlled crash in 2003 in order to avoid contaminating any of Jupiter’s moons, ...