PSYC 2500 Lecture Notes - Lecture 4: Ottawa Sun, Astronomy Class, Sept
1 Jun 2020
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Zenith: point on celestial sphere directly overhead, make a right angle (900) with the n and s horizons. Summer solstice at ottawa: sun reaches maximum altitude of 44. 5 + 23. 5 =68 above the s horizon. Winter solstice: sun reaches maximum altitude of 90-45. 5-23. 5 = 21 above the s horizion. Summer solstice (around june 21st: sun higher in the sky, sun rise ne and sets nw more time above horizon, more daylight in summer. Winter solstice (around dec 21st: sun lower in sky, sun rises se and sets sw less time above horizon, less daylight in winter. Equinoxes : vernal (mar 21st) autumnal (sept 21st: sun rises e and sets w equal amount of time above and below horizon, equal amount of daylight and night. 2 effects: more daylight in summer means more solar heating, sun higher in sky in summer means sun"s rays shining on earth"s surface more concentrated.
