Seasonal Changes Astr 1010-100
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This 1 page One Day of Notes was uploaded by Alyssa Karounos on Friday January 9, 2015. The One Day of Notes belongs to Astr 1010-100 at University of Washington taught by Dr. Oliver Fraser in Winter2015. Since its upload, it has received 129 views. For similar materials see Introductory Astronomy 1 in Astronomy at University of Washington.
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Date Created: 01/09/15
1920 1 5 1 Goals A Relate the length of the day at different locations on the Earth to the tilt of the Earth and its position in orbit II Vocabulary A Daily Sky motions are caused by rotation B Seasons are caused by tilt and revolution III The Ecliptic A the path the sun takes around the sky B You will see different stars depending on the month and what position the sun is facing 1 Ex When in November you will see Taurus because of the Earth s rotation around the sun IV Seasonal Changes A caused by amount of daylight and angle of Sun s rays 1 amount of daylight and angle of sun s rays depends on Earth s tilt in the given month V Earth s Tilt Earth Rotations on a Tilt at 23 degrees Tropic latitudes a place on the earth where the sun s rays come directly overhead Poles will be either completely light or completely dark Arctic and Antarctic Circles winter or summer respectively where the sun is WOW barely or halfway rising F Equinox about 12 hour days for everyone 1 No effect of season changes 2 Sun appears straight overhead on the equator VI When does the sun appear straight overhead A Between 23 degrees Lat or 23 degrees Lat between the tropics any time of the year VII Every planet and moon rotate in the same direction as Earth Except for Venus which is upside down and Uranus which is sideways Mercury has such a small tilt that it barely has any seasons Earth s tilt at 23 degrees greatly in uences the degrees of the Tropics DOW Tilt angles are relative to ecliptic tilt of the Sun