Neptune

Neptune is the eighth, and most distant planet from the Sun. It’s the fourth-largest, and the first planet discovered with math.

Dark, cold and whipped by supersonic winds, giant Neptune is the eighth and most distant major planet orbiting our Sun. The planet’s rich blue color comes from methane in its atmosphere, which absorbs red wavelengths of light, but allows blue ones to be reflected back into space.

Neptune is not visible to the naked eye. In 2011, Neptune completed its first 165-year orbit since its discovery.

Source: NASA