Olbers' Paradox
If the universe is infinite and full of stars, every line of sight should end on one. So why is the night sky dark?
1610 (Kepler), 1744 (de Chéseaux), 1823 (Olbers)17 min read
British-American cosmology
Edward Robert Harrison
1919 – 2007
Cosmologist at the University of Massachusetts Amherst, co-author of the Harrison–Zel'dovich spectrum of primordial density fluctuations. His Darkness at Night (1987) traced the dark-sky problem from Kepler to modern cosmology, recovered Poe's priority, and made the case — now standard — that the finite age of the universe, not expansion or absorption, is the reason the night is dark.