Solstice - Wikipedia
https://en.wikipedia.org/wiki/Solstice
OverviewDefinitions and frames of referenceRelationship to seasonsCultural aspectsIn the constellationsOn other planetsSee alsoExternal linksA solstice is an event that occurs when the Sun reaches its most northerly or southerly excursion relative to the celestial equator on the celestial sphere. Two solstices occur annually, around June 21 and December 21. In many countries, the seasons of the year are determined by the solstices and the equinoxes. The term solstice can also be used in a broader sense, as the day when this occurs. The day o…
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