According to IBM, this stop-motion film (made with individual molecules of carbon monoxide) is the smallest movie that has been, or ever will be, created.
You're looking at the very first image ever taken of the shadow cast by one single atom. Researchers at the at Griffith University in Australia didn't even know if was possible for atoms to cast shadows like this until they tried it, but with some laser-cooled Ytterbium, a fancy lens, and five years of work, they were able to take this picture.
Classical physics is good at describing the motion of big things (such as planets), while quantum physics is needed to describe the behavior of small things, such as atoms. But if you get a big enough atom, its electrons should orbit around just like a planet orbiting the sun, and physicists have managed to make that happen.