Neptune is the eighth planet from the sun, and the outermost gas giant in our solar system. Interestingly enough due to Pluto s eccentric orbit, Neptune is sometimes the furthest planet from the Sun. Orbiting so far from it the planet receives very little heat. Its surface temperature is -218 degrees C. However, the planet seems to have an internal source of heat. Neptune s atmosphere has the highest wind speeds in the solar system, up to 2000 km/h. The planet has large, dark ovals on its surface which astronomers believe are hurricane-like storms. Neptune is never visible with the naked eye so your only chance to have a good look at it is if you download this high-quality Planet Neptune 3D screensaver.