Red light gets absorbed by the methane in the air, giving it a distinct green-blue color. Scientists have found white clouds in the atmosphere as well. The main components of these clouds are methane crystals. This causes the atmosphere to shine very brightly when Sunlight hits the crystals.

The elements which constitute the interior of the planet are unknown. Astronomers make guesses about the characteristics of this Solar System planet by comparing ongoing activities with features of other planets.

Not much is known about the planet because of its large distance from Earth.

Neptun has 13 natural satellites, even though more could be found in future. Some of these include Prospero, Stephano, Caliban, etc. The orbital period of Neptune is 60,190 days or 164.79 years.