Mars GLOWS green — but brighter at day than at night

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By studying Mars’ green glow, the researchers can understand the structure of this layer in the planet’s atmosphere, better understand its altitude range and even observe any changes in reaction to the sun.

First time to see a “green glow” around another planet. In the case of Earth, it’s mostly caused by oxygen, but Mars’ glow is primarily CO2.

So there really ARE “Green Martians.” Just don’t turn and run!

https://edition.cnn.com/2020/06/16/world/mars-green-glow-esa-scn-trnd/index.html