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?