University of Mississippi |
ASTR 101 |
Friday, Sept. 13, 2013 Test 1: Two weeks from today. Today's Topics: Next: In the early 1600s Johannes Kepler formulated his three laws of ellipses, areas, periods. But why do planets move that way? Because of gravity. Assignment: Today's class summary. |
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Spaceweather; APOD; Heavens-Above; Clear Sky Clock; PhysOrg Astronomy News; The Sky at a Glance |