Cov pej xeem 2 hnub qub muaj pes tsawg xyoo?

Video: Cov pej xeem 2 hnub qub muaj pes tsawg xyoo?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

Lawv kuj yog laus hnub qub, nrog muaj hnub nyoog li ntawm 2 - 14 billion xyoo. Heev Cov pejxeem II hnub qub (cov hlau tsis zoo tshaj plaws) muaj nyob rau hauv halo thiab globular pawg; cov no yog cov hnub qub tshaj plaws.

Tib neeg kuj nug, qhov txawv ntawm cov pejxeem 1 thiab 2 hnub qub yog dab tsi?

Cov pejxeem Kuv hnub qub suav nrog lub hnub thiab zoo li luminous, kub thiab hluas, concentrated hauv disks ntawm kauv galaxies. Population II hnub qub zoo li yuav pom nyob rau hauv globular pawg thiab cov nucleus ntawm lub galaxy. Lawv zoo li qub, tsis tshua muaj luminous thiab txias dua Cov pejxeem Kuv hnub qub.

Ib tug kuj nug, dab tsi yog pop I POP II thiab Pop III hnub qub? Pej xeem III ( Pop III ) hnub qub Nws yog tsim los ntawm cov roj ntsha tseem ceeb - hydrogen, helium thiab tsawg heev ntawm lithium thiab beryllium. Cov no Pop III hnub qub ces yuav tsim cov hlau pom nyob rau hauv Pop II star thiab pib maj mam nce hauv metallicity nyob rau tiam tom ntej ntawm hnub qub.

Ntawm no, hom galaxy twg muaj qhov nruab nrab ntawm cov hnub qub tshaj plaws?

Yog li lub hnub qub tsis ntev los no muaj tau tsim, lub richer nyob rau hauv hnyav ntsiab nws yog. Qhov no yog ib daim ntawv ntawm dating system rau hnub qub thiab peb txiav txim siab tias hnub qub halo yog qhov qub hnub qub hauv Galaxy txij li lawv muaj cov tshuaj lom neeg tsawg tshaj plaws.

Lub ntiaj teb puas yog thawj tiam hnub qub?

Ib pab neeg ntawm astronomers tau pom cov pov thawj zoo tshaj plaws rau lub sijhawm thawj tiam ntawm hnub qub , cov uas tsuas yog ua los ntawm cov khoom xyaw uas muab ncaj qha los ntawm lub loj bang. Ua los ntawm qhov tseem ceeb tsuas yog hydrogen thiab helium, cov neeg hu ua III hnub qub tau kwv yees tias yuav loj npaum li cas thiab ua neej nyob sai thiab tuag hluas.

Pom zoo:

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