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Sep 2007
40m 54s

Lecture 05: Mapping Earth & Sky

Richard Pogge
About this episode
Where are we? Where is someplace else? And how do I get there from here? These are questions we need to answer both on the Earth and in the sky to assign a location to a place or celestial object on the surface of a sphere. This lecture includes a review of angular units and the terrestrial system of latitude and longitude on the spherical Earth. We the ... Show More
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Sep 2007
Lecture 06: Daily and Annual Motions
Why do celestial objects appear to rise and set every day? How does this depend on where you are on the Earth, or the time of year? In today's lecture we we set the heavens into motion and review the two most basic celestial motions. Apparent Daily Motion reflects the daily rotat ... Show More
42m 5s
Sep 2007
Lecture 07: The Four Seasons
Why do we have different seasons? This lecture explores the consequences of the tilt of the Earth's rotation axis relative to its orbital plane combined with the apparent annual motions of the Sun around the Ecliptic. The most important factor for determining whether it is hot or ... Show More
38m 3s
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
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