When a comet crashes into Jupiter, the first to see it are amateurs at the Vatican Observatory in Rome, who can't restrain themselves from shouting and dancing. Far to the north, an aurora hunter backs into a freezing river in Iceland and barely notices his frigid feet. His eyes are on the skies. Miracles, mindfulness, and celestial wonder.

Guest: Brother Guy J. Consolmagno, S.J., Director of the Vatican Observatory, "The Pope's Astronomer," and author of "Turn Left at Orion: Hundreds of Night Sky Objects to See in a Home Telescope—and How to Find Them"

Guest: Tom Kerss, F.R.A.S., aurora-hunter, veteran of the Royal Observatory, founder of Stargazing London, and author of "The Northern Lights: The Definitive Guide to Auroras"