Keeb kwm, hmoov tsis zoo, tsis tau khaws cov npe ntawm cov neeg tsim qauv ntawm cov qauv qub qub, xws li cov pyramids hauv Giza Valley hauv tebchaws Iziv lossis Tuam Tsev Hnub Ci hauv South America. Tsuas yog ib qho tuaj yeem hais tau tseeb: tus neeg tsim, thiab tshwj xeeb tshaj yog tus tsim cov qauv no, tsis tsuas yog paub yuav ua li cas ua tiav qhov zoo tshaj plaws kab rov tav nto thiab kom meej meej tuav ntsug, tab sis kuj zoo kawg nkaus mastered rau cov ntsiab lus cardinal. Lawv yeej paub cov ntsiab lus xws li "zenith" thiab "nadir". Qhov no tau pom meej meej nyob rau hauv kev npaj zoo tshaj plaws ntawm cov qauv loj loj thiab lawv qhov kev faib ua tsis ncaj ncees.
Zoo kawg, nadir
Hauv luv, nadir yog qhov ntxeev ntawm zenith. Tab sis thawj yam ua ntej. Cia peb taw qhia peb tus kheej hauv peb lub ntiaj teb qhov chaw. Yog hais tias koj siv lub compass (nyob rau hauv feem ntau niaj hnub smartphones nruab nrog ib tug sib nqus sensor, nws yog ntsia raws li ib daim ntawv thov, tab sis koj kuj siv tau ib tug niaj hnub nrog ib tug sib nqus koob) thiab lub ntsej muag rau sab qaum teb, daim duab yuav zoo li no.
Lub qhov muag ntawm cov neeg soj ntsuam yuav saib rau sab qaum teb, qab - sab qab teb. Cov teb chaws nyob deb sab hnub tuaj yuav pw ntawm sab xis, thiab sab hnub poob yuav pw ntawm sab laug ntawm cov hnub poob romantic thiab cov nyuj qus.
Ncaj nraimnyob rau hauv qhov chaw ntawm lub xilethi-aus dome yuav yog lub zenith. Zoo, tus nadir yog nws qhov opposite, nyob hauv qab no.
Txhua yam no yooj yim thiab qhia meej hauv daim duab.
Nyob rau thaj chaw twg yog lub tswvyim ntawm nadir siv
Yog tias koj xav pom qhov kev taw qhia meej rau nadir, tsuas yog siv cov kav dej ib txwm siv. Thaum lub load calms down thiab cov xov freezes motionless, lub taub hau, zoo li ib tug xub, yuav qhia qhov xav tau kev taw qhia. Txawm li cas los xij, cov neeg tsim khoom xav paub ntau ntxiv txog qhov sib txawv ntawm cov qauv ntawm ntsug thiab kab rov tav, lawv tsis xav txog qhov twg nadir. Astronomy, ntawm qhov tod tes, siv lub tswv yim no los qhia txog ob sab ntawm lub cev cosmic, txheeb ze rau qhov chaw ntawm ib qho chaw ntawm lawv qhov chaw.
Muaj lwm thaj chaw uas koj tuaj yeem hnov lo lus "nadir". Cov no yog aviation thiab astronautics. Thaum xam cov trajectory thiab cov lus qhia ntawm ib lub dav hlau los yog spacecraft, lub nadir kev taw qhia yog cov kev taw qhia ntawm lub ntiajteb txawj nqus, uas plays lub luag hauj lwm tseem ceeb nyob rau hauv cov kev xam.
