Asterism named grouping of stars not a constellation

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Asterism: named grouping of stars, NOT a constellation Famous Asterisms: -Hyades in the face of TAU -Pleiades in the shoulder of TAU -“Big Dipper” in URSA Major (“bear” “great”) -Mizar A,B First true binary star discovered 1600s -Asterism “little dipper” in Ursa Minor (“bear” “little”) The guards were used by Christopher Columbus as a clock Shakespeare’s “Othello” mentions the guards of the pole - “belt” and “sword” of Orion
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-“Waterjar” in AQR -“Circlet” of PSC -“Sword” and “head of Medusa” in PER -“Great Square” in PEG -“Stinger” of SCO -“Teapot” and “bow” and “arrow” of SGR
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Motion and Times: September 22, 23 Autumnal Equinox December 21, 22 Winter Solstice March 20, 21 Vernal (“green” spring) Equinox June 20, 21 Summer Solstice “Solstice” sun rise point on the horizon “stands still”
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o watch the sun rises for a year from a fixed location ex. Backporch North NE East SE South March N NE East SE S Sept, March In Texas: N NE East SE S In tropics: East High Northern Latitude (ex. Norway):
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East The sun after rising remains near the horizon for a long time Earth has a 23 ½° axis tilt June Sept Side View: -The moon must be in the ecliptic plane to have an eclipse -At any given time we can see half of the stars
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Top View of Earth: -Ecliptic= path of the sun through the stars -Zodiac (greek [“zolon” animal])= 12 traditional constellations along ecliptic plus 13 th constellation 13 th : Ophiuchus (“Snake Bearer”) Sun is in Ophiuchus Nov. 30- Dec. 17 th (const) OPH
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Sky at September Sunset: East South West Sky at midnight in September East South West September midnight [1am-1:30am CDT] Ex. December at midnight rising Virgo, setting Pieces
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Examples: June just before sunrise, rising TAU Sept. just before sunrise, high in the sky TAU
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