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equinox-gray autumnal vernal 25.5° earth celestial equator ecliptic path of sun winter summer solstice

October 14, 2012

equinox-gray autumnal vernal 25.5° earth celestial equator ecliptic path of sun winter summer solstice

 

equinox-gray autumnal vernal 25.5° earth celestial equator ecliptic path of sun winter summer solstice

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