In the image, Jupiter's famous Great Red Spot, which appears red in visible light, is a instead a remarkably bright shade of blue. Hubble Space Telescope image of an ultraviolet view of Jupiter ...

The hellish surface of a moon of Jupiter known as Io is riddled with ... a massive volcanic hot spot on the moon's southern hemisphere. The volcanic activity spotted on a planet famed for such ...

Io is Jupiter's third-largest moon, spanning roughly 2,300 miles (3,700 kilometers) across, which makes it slightly bigger than Earth's moon. It orbits Jupiter at a distance of around 262,000 ...