If you look eastward at the same hour for two nights in a row, you'll find that the stars seem to be in the same place. But they're not, and this movement becomes apparent if you continue observing at the same hour for a week or more.
Vahe Peroomian is a Professor of Physics and Astronomy at the USC Dornsife College of Letters, Arts and Sciences.
As a space scientist, every time I go outside with my family, I tell my children to look up at the sky. The front door of our home looks southeast, and on winter nights the constellation Orion hangs majestically just above the horizon as soon as it grows dark enough to see stars.
