Summer Nights
The night sky doesn’t change very much, or so we are told. Aristotle (384–322 BC) set the stage for this assumption with his philosophy of the unchanging starry realm. His teachings persisted for almost 2,000 years. After it was adopted by religion, to question it was heresy. Observers of the night sky slowly chipped away at these teachings by witnessing changes in the night sky. Eventually, these observations could no longer be ignored. The night sky does change, although slowly.
To be fair, changes in the universe occur very slowly, spanning millions of human lifetimes. Some stars have lived as long as the human species, and others have been around for billions of years. Closer to home and with greater rapidity, the planets orbit the sun, and the rotation of
