GEOG 1 Lecture Notes - Lecture 5: Aph Technological Consulting, Sphericity, Spheroid
15 Oct 2020
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Document Summary
Rotation: the spinning of the earth about its axis. 1 turn every 24 hours; defines day & night. * earth turns at different rotational velocity for each degree of latitude; * turns counterclockwise, when viewed from above the north pole. * creates a circle of illumination between areas of light and dark. * atmosphere rotates with earth, held by force of gravity. Revolution: movement of the earth in its orbit around the sun. * 1 orbit every 365. 2422 days = 1 year (365 days, 5. 8 hours) * moves at ~ 66,660 mph as it travels around the sun. * counterclockwise orbit, when viewed from above north pole. * orbit is elliptical, so at one time of year it is closer to the sun than another. * aphelion: farthest from sun (aph- means away from) Why it occurs: revolve around sun with a tilt. * revolution * rotation * tilt of earth on its axis * axial parallelism * sphericity.
