Isiokwu Mbụ nke Aries

Isi ihe mbụ nke Aries na-akụkọ nchikota eklips nke (0°, 0°).  Ọ dị na mbara igwe equator n'aka ekpe na aka nri nke chaatị mbara igwe, na-eji eklips (ope nwere ikike sine curve ) na-agafe na ya.

Isi ihe mbụ nke Aries, nke a na-adị ka cusp nke Aries, bụ ebe vernal equinox ( March equinox ), dị were ka ebe ntụaka na ndị na-akpakọrịta .  Na tsare-eji usoro nhazi dị otú ahụ, a na- Type ya na akara ♈︎.  A aha maka mfọn nke Aries, ọ bụ otu n'ime isi ihe dị na mbara igwe nke mbara igwe na-agafe na mbara igwe, nke ọzọ bụ isi ihe mbụ nke Libra, nke dị kpọmkwem 180 ° site na ya.  N'ihi na precession nke equinoxes ebe ọ bụ na ọnọdụ na mbụ aha ya n'oge ochie, ọnọdụ nke Sun mgbe na vernal equinox bụ ugbu a na Pisces;  mgbe ọ dị na Autumnal equinox ( September equinox ), ọ bụ na Virgo (dị ka nke J2000).

N'iyi ụzọ ya kwa afọ site na zodiac, ọmụmụ na-ezute equator nke onye site na ndịda ruo n'ebe ugwu na ebe mbụ nke Aries, na site na ugwu ruo n'ebe ndịda na ebe mbụ nke Libra.  A na-ewere isi ihe mbụ nke Aries dị ka nke ọnụnọ " prime meridian " nke esi na ya gbakọọ nrịgo aka nri .