Hauv xyoo 1908, spectroscopy tau qhia tias Mizar B kuj yog khub hnub qub, ua rau pab pawg thawj lub hnub qub quintuple paub. … Mamajek tab tom txuas ntxiv nws txoj kev mob siab nrhiav cov ntiaj chaw nyob ib puag ncig cov hnub qub nyob ze, tab sis nws txoj kev xav tsis yog tag nrho Alcor thiab Mizar.
Lub hnub qub yog Mizar?
Mizar /ˈmaɪzɑːr/ yog ib lub hnub qub thib obnyob rau hauv qhov kov ntawm Big Dipper asterism hauv lub hnub qub ntawm Ursa Major. Nws muaj lub npe Bayer ζ Ursae Majoris (Latinised li Zeta Ursae Majoris). Nws tsim lub qhov muag liab qab ob lub hnub qub nrog lub hnub qub fainter Alcor, thiab nws tus kheej yog plaub lub hnub qub system.
Puas Mizar yog plaub lub hnub qub?
Ntawm hnub tom qab, Mizar's dimmer telescopic tivthaiv kuj pom nws tus kheej ua spectroscopic binary, txhais tau tias Mizar muaj ob pawg ntawm binaries - ua rau nws a plaub lub hnub qub.
Puas muaj lub hnub qub binary nyob rau hauv Big Dipper?
Nyob rau hauv ancient sij hawm, cov neeg uas muaj kev pom tshwj xeeb pom tau hais tias ib tug ntawm cov brightest hnub qub nyob rau hauv lub Big Dipper yog, qhov tseeb, ob lub hnub qub nyob ze ua ke uas cov neeg feem coob tsis paub qhov txawv lawv. Ob lub hnub qub, Alcor thiab Mizar, yog thawj lub hnub qub binary - ob lub hnub qub uas ncig ib leeg- puas tau paub.
Puas yog Mizar Ib Dwarf liab?
Qhov teeb meem ntawd zoo li tau daws nyob rau hauv 2009, thaum kev soj ntsuam los ntawm ob pab neeg ywj pheej ntawm astronomers tsis tsuas yog qhia tias Alcor muaj xim liab.tus phooj ywg dwarf, tab sis hais tias nws yog tethered rau Mizar. Tsuas yog NW nyuam qhuav. Ob leeg sib cais los ntawm 0.5-1.5 light-years.
