Michel took two high power LED flash-lights, placed them 2m apart and crossed their beams. The camera was placed where they crossed. “If you were on an Earth like exoplanet orbiting a binary star system like Star Wars’ Tatooine and if a rain shower come thru this is what it could look like.”
No need to travel to Tatooine. Find a smooth lake, rain wet parking lot or wave wet beach sand. Look opposite the sun to see a similar sight. Sunlight reflects upwards from the mirror like water. To a raindrop there are two suns shining. Who could fail to make two sets of rainbows with such a sight?