Question

Why is Neptune blue what causes it to be blue

Answer 1

Neptune's climate is comprised of hydrogen, helium and methane. The methane in Neptune's upper air ingests the red light from the sun yet mirrors the blue light from the Sun once again into space. This is the reason Neptune seems blue.

Step-by-step explanation:

Answer 2

Neptune is basically made up from methane, hydrogen, and helium. So the methane in Neptunes atmosphere sucks or absorbs the suns light- which is red, but reflects blue due to the methane back to space (:
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