A bit larger than our Moon, Io is the innermost of Jupiter’s four large moons. As it circles Jupiter, Io is gravitationally perturbed by its three sister moons, first being pushed slightly closer to ...

Or perhaps more likely, look at under a microscope. The latest candidate for hosting nearby life is Jupiter’s moon, Io. Let’s take a look at what makes Io special, and what we might hope to ...

Io is well-known as the most geologically active world in the solar system, and it's not even close. It has more than 400 active volcanoes. Io is the closest moon to Jupiter, and the planet's ...

Jupiter, the largest planet in our solar system, is home to a fascinating array of moons. Among its 90-plus satellites, one ...

Learn how you can see bright Jupiter from Earth, helped by its massive size and banded, reflective cloud tops, in December's ...

Magnetic vortices twisting down from Jupiter's ionosphere into its deep atmosphere cause giant, ultraviolet-absorbing polar ...

Scientists have discovered Earth-sized dark UV spots at Jupiter's poles, likely caused by magnetically driven vortices ...

On November 21, 1676, the Danish astronomer Ole Rømer discovered the speed of light. Before Rømer figured it out, scientists ...

Jupiter shines brightly in the east around 7 p.m. right now. Our solar system’s largest planet is nicely placed between the horns of Taurus, the Bull.

NASA's Juno spacecraft has sent back new, eye-catching images of Jupiter, capturing intricate views of the planet's turbulent ...

Jupiter is a stunning planet to observe. Whether it be visible light or any other wavelength. In a stunning new image ...