Why are Uranus and Neptune so blue?
A) Hydrogen appears blue when it reflects sunlight.
B) They reflect blue light from their moons.
C) Methane in their atmospheres absorb red light and reflect blue light.
D) The planets are very hot, so their blackbody spectra peak at blue wavelengths.

Question

Quizplus · Accepted Answer

Methane in the atmospheres of Uranus and Neptune absorbs red light and reflects blue light, giving them their blue appearance.

Why Are Uranus and Neptune So Blue