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. On Neptune, one "day" (time it takes to rotate once on its axis) takes 16 hours. It has 13 moons & 6 rings.
Astronomy fact 33 of 42 - It takes 165 years for Neptune to orbit the Sun, meaning it has only recently completed its first orbit since its discovery in 1846. ♥ Pin, share and comment. x
Uranus is the only giant planet whose equator is nearly at right angles to its orbit. A collision with an Earth-sized object may explain Uranus鈥?unique tilt. Nearly a twin in size to Neptune, Uranus has more methane in its mainly hydrogen and helium atmosphere than Jupiter or Saturn. Methane gives Uranus its blue tint.
New Horizons spacecraft crosses Neptune orbit en route to historic Pluto encounter