For the first time in recorded history, Comet NEOWISE is visiting the inner solar system solar system. The last time it was here, streaking through the Earth’s skies in the year 4745 BCE, in the midst of the Neolithic period. I’ve seen a number of comets in my life — Halley, in 1986; Hale-Bopp inContinue reading “Searching for Comets”