Cosmic Hourglass Time and Space Bookmark

This highly detailed black and white bookmark design features an hourglass filled not with sand, but with the entire cosmos. The top chamber contains a spiral galaxy and stars, while the bottom chamber holds a planet with rings (like Saturn) resting on a starry field. Comets and cosmic dust are shown falling through the neck of the hourglass, emphasizing the passage of time across the universe. This model is perfect for fans of astronomy, concepts of time, space exploration, and symbolic, imaginative designs