Each painting takes months to complete. Bean talks to the other astronauts and asks for their impressions of the moon. He studies NASA photographs. Like artist Chesley Bonestell , he makes models, paints studies, all before finally creating a finished work. Like the French impressionist Monet, the artist who influenced him the most, Bean breaks solid colors into softer combinations of colors.
Art is different from science.
As we know, in science, everyone should be able to repeat the same experiment about gravity or electricity and get the same results. But in art you don't want the same results. You want your own feeling for it.