Dark, cold & whipped by supersonic winds, Neptune is a hydrogen & helium gas giant in our solar system. Over 30 times as far from the sun as Earth, it takes almost 165 Earth years to orbit our sun. In 2011, Neptune completed its first orbit since its discovery in 1846. On Neptune, one "day" (time it takes to rotate once on its axis) takes 16 hours. It makes a complete orbit @ the sun in 165 Earth years. It has 13 moons & 6 rings. Photo: the "sideways" planet with vertically orbiting rings