Triton is the largest natural satellite of the planet Neptune, and was the first Neptunian moon to be discovered, on October 10, 1846, by English astronomer William Lassell. It is the only large moon in the Solar System with a retrograde orbit, an orbit in the direction opposite to its planet's rotation. Triton is one of the few moons in the Solar System known to be geologically active (the others being Jupiter's Io and Europa, and Saturn's Enceladus and Titan). As a consequence, its surface is relatively young, with few obvious impact craters. Triton has a surface of mostly frozen nitrogen, a mostly water-ice crust, an icy mantle and a substantial core of rock and metal. Anderson Design Group has rendered this classic space travel design in the tradition of the futuristic, overly-optimistic, American Atomic Age. Fashioned after the vintage poster art and retro illustrations of the mid-20th century, this art is perfect for decorating kids rooms, man caves, and mod pads. Without a doubt, this original design and colorful vintage illustration is totally Out Of This World! This retro-styled interstellar illustration will look great as an art print, notecard, postcard, metal sign, canvas, or mini canvas. To learn more about space travel and what the next big space adventure plans are, check out the official website for NASA.