Answer:The point where the Sun crosses the celestial Equator and has zero Declination and is considered to be the zero for the Right Ascension in hours (h) or degrees (^o).
Step-by-step explanation:
Vernal Equinox: The point where the Sun crosses the celestial Equator and has zero Declination and is considered to be the zero for the Right Ascension in hours (h) or degrees (^o).
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