A star galaxy projector light designed with an astronaut theme typically combines an astronaut figurine with a cosmic light show. These projectors often feature a small astronaut figure that sits at the base of the device, with the projector casting a mesmerizing display of stars, galaxies, and nebulae onto the walls and ceiling. The lights may change colors, simulate moving stars, or create different space-themed visuals, allowing users to experience a night sky indoors.