Ursa Ukwu

 

Ursa / ( / ˈɜːrsə ˈ mɪ dʒər / ; nke a dị ka Great Bear ) bụ mkpọ̀ dị na mbara igwe nke dị n'ebe ugwu, nke ndị ndu ifo ndị na-enwe ikike ike ịgba laa azụ na mbụ.  Aha Latin ya "nnukwu anụ anụ bea (ma ọ bụ ibu)", na-ezo aka na iche na Ursa Minor dị nso, obere anụ anụ bea.  [1] N'oge ochie, ọ bụ otu n'ime akwụkwọ iri anọ na mbụ Ptolemy depụtara na apụ afụ nke AD, na-adabere na ọrụ ndị Gris, ndị Ijipt, na ndị Asiria na- mbara igwe.  [2] Taa, ọ bụ nke atọ kasị ukwuu n'ime m ike 88 nke oge a.

A maara Ursa Major nke ọma site na asterism nke akwụkwọ asaa ya, nke a na-akpọ " Big Dipper ", "Wagon", "Charles's Wain", ma ọ bụ "Plough", n'etiti aha ndị ọzọ.  akwụkwọ, nhazi stellar Big Dipper na-e USB nke " Little Dipper ".  asụsụ n'ime ugboro ya, aha ya bụ Dubhe na Merak ( α Ursae Majoris na β Ursae Majoris ), nwere ike iji mee ihe dị ka ihe nrịbama n'ikiri ebe ogwe ugwu dị ugbu a, Polaris na Ursa Minor .

A na-ahụ Ursa Major n'ime afɔ niile site na ọtụtụ mpaghara ugwu, ọ na-ekwukwa n'elu ugwu etiti ugwu.  Site na latitudes ndị ihu igwe, asterism bụ isi ngwa ahụ anya, mana na-ahụ ike ịhụ ndị nke akwụkwọ ahụ.

. Ursa Major na-ekpuchi 1279.66 square degrees ma ọ bụ 3.10% nke mkpokọta mbara igwe, na-eme ka ọ bụ nke a kasị ukwuu ukwuu Mịgha.  [1] N'afọ 1930, Eugène Delporte debere na-eje ndị na-ahụ maka mbara igwe nke International Astronomical Union (IAU), na-achọta dị ka polygon na-enye ego 28. N'ime usoro nhazi nke equatorial, m ike ike 28.  na-agụnye n'etiti nhazi nrịgo elu nke 08h 08.3 m na 14h 29.0 m na nna nna nke + 28.30 ° na + 73.14 °.  [2] Ursa Major nwere oke ndị ọzọ: Draco n'ebe ugwu na ugwu ndị na-amụ, Boötes n' ventila, Canes Venaci n'Ụbọchị ọmụmụ na ndị mụrụ ọmụmụ, Coma Berenices na ndị mụrụ ọmụmụ, Leo na Leo  Minor na ndịda, Lynx na ndị agha egwuregwu yana Camelopardalis n'ebe ugwu-ụta.  .  Ndị IAU akwụkwọ mkpokọta mkpokọta nke nwere ike atọ "UMa" na 1922