Rainbows on Mars? One shows up in photo and NASA offers this explanation Mark Price, The Charlotte Observer Apr. 8—NASA has been forced to do some explaining this week, after a photo taken April 4 on Mars appeared to show the Angry Red Planet had a rainbow. That should be impossible, given that it doesn't rain on Mars. Yet there it was, riding high in a gloomy photo credited to the Mars Perseverance rover. Social media — which loves a good conspiracy — immediately began asking funny questions, making strange suggestions and crafting memes. "I'm starting to think NASA is lying to us," one commenter wrote on NASA's Perseverance Twitter page. "Maybe the rover is in a desert on Earth. .... That thing sure looks like a rainbow."