WHY ARE URANUS AND NEPTUNE BLUE?

          Uranus’ colour comes from the presence of methane clouds in the planet’s atmosphere. Methane absorbs red light, reflecting only blue and green. Neptune’s upper atmosphere contains more methane than Uranus’, which gives the planet’s clouds their striking blue colour.

          Because of this, its poles are sometimes pointed almost directly at the Sun. Uranus’ atmosphere is made up of hydrogen, helium, and methane. The temperature in the upper atmosphere is very cold. The cold methane gas is what gives Uranus its blue-green color.

          The planet Uranus tilts over so far on its axis that it rotates on its side. Because of this, its poles are sometimes pointed almost directly at the Sun. Uranus’ atmosphere is made up of hydrogen, helium, and methane. The temperature in the upper atmosphere is very cold. The cold methane gas is what gives Uranus its blue-green color. The rapid rotation of Uranus causes winds up to 600 kilometers per hour to blow in its atmosphere. Uranus has eleven known rings which contain dark, boulder-sized particles. Uranus has 27 named moons. Some of these moons are less than 100 kilometers wide and black as coal. (The others are Jupiter, Saturn, and Neptune.) Its atmosphere is composed primarily of hydrogen and helium, with a small amount of methane and traces of water and ammonia. Uranus gets its blue-green color from methane gas. Sunlight is reflected from Uranus’s cloud tops, which lie beneath a layer of methane gas.

          Neptune’s atmosphere is made up of hydrogen (80%), helium (19%) and methane (1%). Despite only being a small fraction of the overall atmospheric composition, methane in the upper atmosphere is responsible for Neptune’s blue colour. Methane absorbs the red part of the light from the sun and reflects the blue light. This makes Neptune look blue.