ESA's Mars Express orbiter captured footage of the Mars' moon Deimos pass in front of Ganymede, Europa, Jupiter, Io and ...

At last count, Jupiter has 95 moons, but the four main ones — Ganymede, Callisto, Io and Europa — were discovered in 1610 by famed Italian astronomer Galileo Galilei.

On July 6, 1938, an American astronomer named Seth Barnes Nicholson discovered Jupiter's moon Lysithea. Nicholson spotted ...

The moon-man is painted with rock … specifically, basalt, the dark rock that flows from Hawaiian volcanoes, paving the ...