I saw this announcement a few days ago on Space.com website – No, the Perseverance rover didn’t spot a rainbow on Mars Space.com April 7, 2021: https://www.space.com/perseverance-rover-mars-rainbow-photo. Worth a read if you are into things space-related. Much longer article, but article has photos.
Mike Wall April 7, 2021
This Mars “rainbow” would lead only to fool’s gold.
NASA’s Perseverance rover snapped a photo on Sunday (April 4) that appeared to show a rainbow arcing across the dusty Martian sky. The striking image spread quickly across social media, as did the “rainbow” explanation, prompting NASA to step in with the real story.
“Many have asked: Is that a rainbow on Mars? No. Rainbows aren’t possible here. Rainbows are created by light reflected off of round water droplets, but there isn’t enough water here to condense, and it’s too cold for liquid water in the atmosphere. This arc is a lens flare,” agency officials wrote Tuesday via Perseverance’s official Twitter account, @NASAPersevere.