The Sun and the Seasons

On march 21 the suns declination is 0 in grand rapids

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Unformatted text preview: to the transit altitude of the celestial equator (observer latitude dependant). On March 21, the Sun’s declination is 0°. In Grand Rapids the altitude of the celestial equator is _____° In Grand Rapids the noon altitude of the Sun is _____° The Sun and its Motions Summer Solstice – June 21. Sun 23.5° north of celestial equator, (Dec = +23.5°) rises northeast, sets northwest. 15-hours daylight, 9-hours night (in Grand Rapids). The Sun and its Motions The highest point the Sun reaches (its transit altitude – also called its “noon altitude”) is given by adding its declination to the transit altitude of the celestial equator (observer latitude dependant). On June 21, the Sun’s declination is +23.5°. In Grand Rapids the altitude of the celestial equator is _____° In Grand Rapids the noon altitude of the Sun is _____° The Sun and its Motions Autumnal Equinox – September 21. Sun on the celestial equator, (Dec = 0°) rises due east, sets due west. 12-hours daylight, 12-hours night. The Sun and its Motions Winter Solstice – December 21. Sun 23.5° south of celestial equator, (Dec = -23.5°) rises southeast, sets southwest. 9-hours daylight, 15-hours night (in Grand Rapids). The Sun and its Motions The highest point the Sun reaches (its transit altitude – also called its “noon...
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This note was uploaded on 01/31/2010 for the course AS 103 taught by Professor Millar during the Fall '08 term at Grand Rapids Community College.

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