Mimas looks much like our Moon, with a heavily cratered surface. It didn’t host any ... and the moons Ganymede and Callisto, which show hints of oceans. And in the fall of 2024, NASA will ...

and Callisto. The Moon is non-luminous, meaning that it does not produce light. We see the Moon because it reflects light from the Sun, and half of the Moon’s surface is always illuminated.

Callisto may not make headlines like Io or Europa, but its beauty is unmatched. See this mysterious moon as you’ve never seen it before with these stunning high-resolution images. Dive into the ...