How do we make calendars? This lecture explores the astronomical
origins of our calendars. We start by discussing lunar and solar
calendars and their hybrids in history and tradition (for example, the
Islamic Lunar Calendar and the Hebrew Luni-Solar Calendar), and then
describe the Julian and Gregorian Calendar reforms that attempt to align
the calendar w ... Show More
Oct 2007
Lecture 09: Eclipses of the Sun and Moon
Among the most amazing sights in the sky, eclipses of the Sun and
Moon have long fascinated us. This lecture describes the eclipses of
the Sun and Moon, their types, and how often they occur.
Recorded 2007 Oct 1 in 1000 McPherson Lab on the Columbus campus
of The Ohio State Unive ... Show More
40m 23s
Sep 2007
Lecture 08: The Phases of the Moon
What are the Phases of the Moon? This lecture introduces the Moon and
describes the monthly cycle of phases. Topics include synchronous
rotation, apogee and perigee, the cycle of phases, and the sidereal and
synodic month. Recorded 2007 Sep 28 in 1000 McPherson Lab on the
Columbu ... Show More
42m 34s