Callisto

Io, Jupiter’s Volcanic Moon

Io is one of the four large Galilean moons of Jupiter, visible with binoculars or a small telescope. Let's learn…

8 years ago

Jupiter’s Moon Callisto

With 67 confirmed satellites, Jupiter has the largest system of moons in the Solar System. The greatest of these are…

8 years ago

Jupiter’s Moon Ganymede

In 1610, Galileo Galilei looked up at the night sky through a telescope of his own design. Spotting Jupiter, he…

8 years ago

Jupiter’s Moon Europa

Jupiter's four largest moons - aka. the Galilean Moons, consisting of Io, Europa, Ganymede, and Callisto - are nothing if…

8 years ago

What are the Galilean Moons?

It's no accident that Jupiter shares its name with the king of the gods. In addition to being the largest…

9 years ago

Pluto’s Closeup Will Be Awesome Based On Jupiter Pics From New Horizons Spacecraft

New Horizons, you gotta wake up this weekend. There's so much work ahead of you when you reach Pluto next…

9 years ago

Jupiter-Bound Spacecraft Takes A Small Step To Seek Habitable Worlds

It takes years of painstaking work to get a spacecraft off the ground. So when you have a spacecraft like…

9 years ago

Observing Alert: Rare Triple Transit Of Jupiter’s Moons Happens Friday Night (Oct. 11-12)

Talk about a great fall lineup. Three of Jupiter's four brightest moons plan a rare show for telescopic observers on…

10 years ago

One of Jupiter’s Moons is Melted!

[/caption] Jupiter's two moons Ganymede and Callisto could be considered fraternal twins. They have a similar composition and size, but…

14 years ago