Equator nke eluigwe
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Equator celestial bụ nnukwu ibu nke mbara igwe a na-eche echiche n'otu ụgbọ elu dị ka equator nke ike . Site na ndọtị, ọ bụkwa ụgbọ elu ntụaka na usoro nhazi nke equatorial . N'ikwu ya n'ụzọ ọzọ, equator celestial bụ ntụle a na-ahụ ahụ anya nke equator terrestrial na mbara mbara . [1] N'ihi ntugharị axial nke ụwa, equator celestial na-achọ ugbu a ihe dị ka 23.44 Celsius n'ihe gbasara eklips (gbo elu nke orbit ụwa ), mana ọ dị iche site na ihe dịka 22.0 ° ruo 24.5 ° n 'ime 5 gara aga. nde afu [2] n'ihi nhụsianya sitere na mbara ala ndị ọzọ.
. [1]Onye na-ekiri ihe na-eso n'elu equator na-ama na-ahụ anya nke ọnụnọ equator dị ka ọkara na-agafe zenith, isi ihe dị n'elu. Ka onye na-ekiri ihe na-aga n'ebe ugwu (ma ọ bụ n'ebe ndịda), equator celestial na-ehulata n' maida nke ọzọ. A kọwapụtara equator celestial ka ọ dị anya na-achọ achọ (ebe ọ dị na mbara igwe); Ya mere, nsõtụ nke ọkara na-agbakọ mgbe niile na mbara ihu n'ụdị iwu na-egosi, n'agbanyeghị ọnọdụ onye na-ekiri ya n'ụwa. N'osisi ndị dị n'elu, mbara igwe na-adaba na mbara igwe. N'ebe niile, mbara igwe equator bụ arc ma ọ bụ akpụkpọ edo edo n'ihi na onye na-ekiri ya na-anọ naanị n'ebe dị anya site na ụgbọ elu nke akara equator, mana njedebe na mbara igwe. onwe ya
- ↑ Millar (2006). The Amateur Astronomer's Introduction to the Celestial Sphere. Cambridge University Press. ISBN 978-0-521-67123-1.