Why is Neptune blue in color?
Another interesting fact about Neptune is it’s color. Neptune is a gas planet (like Jupiter, Saturn and Uranus, however smaller in size), and it’s upper atmosphere is made up of gases such as Hydrogen, Helium, Methane, Ammonia and water. Methane on Neptune’s surface absorbs light coming from the Sun at 600nm, which corresponds to the red region of the visible light spectrum. Therefore, methane absorbs red light and reflects blue end of the spectrum back into space. Neptune’s color is nothing but reflected sunlight minus red end of the spectrum. This is how Neptune gets it’s azure blue color. Moons of Neptune 17 days after the planet Neptune was discovered, an astronomer named William Lassell discovered Neptune’s first moon, Triton. Triton is 2707 kn in diameter, and had it been orbiting the Sun, instead of Neptune, then it could have been called a planet. An interesting fact about Neptune’s Triton is that Triton’s surface temperature is only 38 Kelvin, which makes Triton one of the col
