This Powerpoint slide show is used to introduce a unit or course on astronomy for Earth science or astronomy classes. It starts with the individual student (an organism) and moves down to smaller and smaller scales, through organ systems, organs, tissues, cells, the cell nucleus, the DNA molecule, the carbon atom, the proton, quarks, and quantum foam. It then returns to the individual student and proceeds outward to the edge of the observable universe and possible multiverse. It contains teacher notes which can be used to add interest and explanations to the slide show. The central messages of this presentation are that the students live at the intersection between inner space and outer space, and that there are still many things we don't understand about the universe, and much for us to learn.