Annual Motion.docx - Annual Motion Annual motion is the...

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Annual Motion -Annual motion is the apparent yearly movement of the stars as observedfrom Earth as a direct effect of the Earth’s revolution around the sun.The sun revolves 360 degrees a year around a path on the celestial spherecalled theecliptic. The sun moves eastward with respect to the stars on thecelestial sphere. It can be observed that the sun’s altitude changes withseason. Its altitude is at maximum during summer solstice and at minimumduring winter solstice. Also, sunrise and sunset points in the horizonchanges with season. The sun rises north of east in the summer, and southof east in the winter.As the sun revolves around the ecliptic, different stars and constellationsappear on the horizon throughout the year. These are known as theconstellations of the Zodiac.The Ecliptic is the path of the Sun’s annual motion along the celestialsphere,the ecliptic is titled at twenty three point five degree anglecompared to the equator of the celestial sphere.

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