Listen to U.Va. astronomer Ed Murphy:
Sept. 22, 2010 — What will you be doing at 11:09 tonight? Watching the news on TV? Reading? Getting ready for bed? Already sleeping? Whatever your routine, tonight at 11:09, summer will transition to autumn. Earth has its own routines.
In this podcast, science writer Fariss Samarrai discusses the autumnal equinox with astronomer Ed Murphy of the University of Virginia's College of Arts & Sciences.