October 02, 2007

Lecture 10: Telling Time

What time is it? Telling time is the oldest practical application of

astronomy. Today's lecture is the first of a 2-part lecture on the

astronomical origins of our methods of keeping time and making

calendars. This lecture reviews the divisions of the year into the

solstices, equinoxes, and cross-quarter days, the division of the year

into months by moon phase cycles, months into weeks, and the division

of the day into hours by marking the location of the Sun in the sky

Recorded 2007 Oct 2 in 1000 McPherson Lab on the Columbus

campus of The Ohio State University.

...more

By Richard Pogge

4.9

77 ratings

October 02, 2007

What time is it? Telling time is the oldest practical application of

astronomy. Today's lecture is the first of a 2-part lecture on the

astronomical origins of our methods of keeping time and making

calendars. This lecture reviews the divisions of the year into the

solstices, equinoxes, and cross-quarter days, the division of the year

into months by moon phase cycles, months into weeks, and the division

of the day into hours by marking the location of the Sun in the sky

Recorded 2007 Oct 2 in 1000 McPherson Lab on the Columbus

campus of The Ohio State University.

...more

More shows like Astronomy 161 - Introduction to Solar System Astronomy - Autumn 2007

1,357 Listeners

112,758 Listeners

2,315 Listeners

510 Listeners