Lecture 1

Lecture 1 - Tropic of Cancer(23.5° N – the northernmost...

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9/22/09 Ecliptic – the path the sun takes in the sky over the course of the year Zodiac – the 12 constellations that lie along the Ecliptic in the sky Your sign is the constellation behind the sun when you were born (not the one you can see) Winter Solstice – day of year when… a) Axis points most directly away from sun b) Sun is at its lowest angle in sky (Northern Hemisphere) c) Shortest day of year Summer Solstice – day of year when… a) Axis pointed most directly towards sun b) Sun at highest in sky (Western Hemisphere) c) Longest day of year Equinox (Fall/Spring) a) Axis at right angle to the sun (neither away or towards) b) Equal amounts of light and dark c) Sun appears directly overhead from the equator (explains your zodiac)
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Unformatted text preview: Tropic of Cancer (23.5° N) – the northernmost latitude at which you can see the sun directly overhead (at some point in the year) Tropic of Capricorn (23.5° S) – the southernmost latitude at which you can see the sun directly overhead (at some point in the year) Arctic Circle – the southernmost latitude at which you can experience polar night (sun never rises) or polar day (sun never sets) Antarctic Circle – the northernmost latitude at which you can experience polar night (sun never rises) or polar day (sun never sets) 0° Tilt – no seasons, sun always at same angle 90° Tilt (Northern Hemisphere) -extreme winter (polar night)-equinox (fall/spring)-extreme summer (polar day)...
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This note was uploaded on 02/17/2010 for the course PHY 115 taught by Professor Weinbeck during the Spring '09 term at BC.

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Lecture 1 - Tropic of Cancer(23.5° N – the northernmost...

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