an enthusiastic astronomer adjusts a large telescope while pointing excitedly toward the star-filled sky. Her assistant holds star charts and looks through binoculars at the cosmic display above. The telescope reveals swirling galaxies, bright nebulae, and countless stars stretching endlessly in all directions. Planets, meteor showers, and distant solar systems fill the entire night sky around them. The two scientists stand in awe as they observe layer upon layer of celestial objects extending infinitely outward. all existing matter and space considered as a whole