Full Moon and Jupiter sharing a field of view. 

Labeled top to bottom, the tiny pinpricks of light above bright Jupiter are the four Galilean moons; Callisto, Europa, Ganymede, and Io. Callisto, Ganymede, and Io are physically larger than Earth’s Moon, while water world Europa is only slightly smaller. In fact, of the Solar System’s six largest planetary satellites, only Saturn’s moon Titan is missing from the scene.

Image Credit & Copyright: Göran Strand

I thought I’d start off a series of photos about the moons in our Solar System. This is a wonderful image of Callisto, a moon in the Jovian system and one of the 4 Galilean moons. It is the 3rd largest moon in the Solar system, with a diameter of 4821km. For comparison, the diameter of Mercury is 4878km. Its orbit around Jupiter is tidally locked, so its keeping the same face turned to Jupiter. Its appearance is very unique in our Solar System; There’s nothing quite like it, with the surface being extremely heavily cratered and very old. (。◕‿◕。)

battle ready