Ganymede, one of Jupiter's 63 known moons was discovered by Galileo in the year 1610. This was the first discovery of a moon orbiting a planet other than Earth. The spacecraft orbiting Jupiter is Cassini. According to NASA the Cassini project is the "most ambitious effort in planetary space exploration ever mounted". Cassini will explore the Saturnian system in detail over a four-year period. Part of our 15 print set of Solar System Prints, "Ganymede" is printed on the highest quality cover stock with hand carved woodblocks. 18" x 24"