Neptune

The eighth and final planet in our solar system, Neptune, is located 4.5 billion kilometers from the Sun. Due to this large distance, Neptune takes 165 Earth years to complete a single orbit around the Sun.

Much like its sister planet Uranus, Neptune appears blue because of atmospheric gases such as methane.

This planet has a turbulent atmosphere, with wind speeds of up to 1200 miles per hour and temperatures above its clouds as low as –360°F.

It also has a few darker and lighter spots. In 1989, the spacecraft Voyager 2 visited Neptune and discovered a dark blue feature called the Great Dark Spot located south of the equator.

However, this spot later disappeared in images taken by the Hubble Space Telescope, and a new dark spot was observed north of the equator.

Like the other outer planets, it also has rings composed of ice and dust.

Neptune has a total of sixteen moons. Among them, only Triton has a spherical shape and orbits in the opposite direction of the planet's rotation.