"Mars Probe Discovers Surprising Green Glow in Red Planet's Atmosphere"

The European Space Agency's ExoMars Trace Gas Orbiter has observed Mars' atmosphere glowing green for the first time in visible light. This phenomenon, known as airglow, occurs when two oxygen atoms combine to form an oxygen molecule. Scientists have suspected Mars to have airglow for 40 years, and the first observation occurred a decade ago. Studying Mars' nightglow will provide insight into the composition and dynamics of its upper atmosphere, aiding in the design of future spacecraft and potential manned missions to the Red Planet.