Are the planets emitting rays in diferent colors ?
The light you see from different planets is sunlight reflecting off of them. Different minerals or gases in the planets absorb different frequencies (or colours) in the sunlight’s spectrum, and reflect different frequencies (colours) of light back at us. Mars looks reddish because the surface absorbs a lot of the non-red colours in the sunlight. Our atmosphere absorbs some more of the light, further changing the colours we end up seeing. Except for Jupiter’s Aurora lights, the planets do not generate and emit much of the light we see. If the gas giants do create some light, it will be a negligible amount compared to the sunlight.
