Why is the Sun blue? This is because light from the sun is scattered based on what's in each planet's atmosphere. Sunlight will have interactions with dust particles. The scattering of light by these particles is the key to the colors we see. The atmosphere of Mars is filled with carbon dioxide and has a lot of dust. This fine dust tends to scatter red light so that the sky appears red, allowing blue light to pass through. #space #universe #vutrubaolaa #sun #mars