Usoro nhazi nke equatorial

. [1] [2]Sistemụ nchikota nke equatorial bụ usoro nhazi nke mmadụ bụ nke a na-ahụ mmetụta pụta nke ihe igwe . Ụgbọ elu dị mkpa nke nwere ntule nke equator nke ụwa na mbara igwe (na-eme elu igwe equator), ntụzịaka bụ equator. isi n'ụdị vernal equinox, na ebu aka nri
Mmalite dị n'etiti ụwa nkịtị na nhazi ahụ bụ geocentric, ya bụ, dị ka a na-ahụ site na etiti ụwa dị ka a ga-assị na ọ bụ uzo . [1] The isi ụgbọ elu na isi igodo na nhazi usoro, mgbe kwekọọ na Earth's equator na okporo osisi, adịghị bugharia na ikike, ma na-ụdịtụ nke ụfọdụ ndabere . Mgbakọ aka nri na nhazi na-akụkọ n'ebe ugwu site na mmalite gburugburu ụgbọ elu bụ isi.
.Nkọwapụta nke nghazi nke etiti ntụnye aka ka dị mfe; nghazi na-dị nnọọ ofu. Ntu ụzọ dị si nke axis nke ụwa, nke mbụ, na-eme ka nhazi ahụ ji na-enye na-aga n'ihu n'ebe e nwere ike inyere okporo osisi nke eklips, na-emecha otu sekit n'ihe dị ka afọ 26,000. . Ekwadoro na nke a bụ obere mgbanwe nke eklips, na obere oscillation nke axis ụwa, nutation [3]
- ↑ Nautical Almanac Office, U.S. Naval Observatory (1961). Explanatory Supplement to the Astronomical Ephemeris and the American Ephemeris and Nautical Almanac. H.M. Stationery Office, London (reprint 1974), 24, 26.
- ↑ Vallado (2001). Fundamentals of Astrodynamics and Applications. Microcosm Press, El Segundo, CA. ISBN 1-881883-12-4.
- ↑ Explanatory Supplement (1961), pp. 20, 28