Video: Dab tsi yog extrasolar planets ua los ntawm?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Astronomers feem ntau ntseeg tias pob zeb exoplanets yog tsim -raws li lub ntiaj teb yog-loj ntawm hlau, oxygen, magnesium, thiab silicon, tsuas yog ib feem me me ntawm carbon. Hauv kev sib piv, carbon-nplua nuj ntiaj chaw tuaj yeem muaj nyob nruab nrab ntawm qhov feem pua me me thiab peb feem peb ntawm lawv qhov hnyav hauv carbon.
Ib yam li ntawd, koj tuaj yeem nug, ua li cas exoplanet tsim?
Core acretion yog txoj hauv kev "hauv qab-up": cov khoom loj tsim los ntawm cov me me, thaum kawg tsim mus txog exoplanets . Gravitational instability yog txoj kev "top-down": Exoplanets daim ntawv ncaj qha los ntawm cov qauv loj nyob rau hauv lub primordial disks ntawm cov pa roj thiab hmoov av orbiting hluas hnub qub.
Kuj Paub, qhov zoo tshaj plaws piav qhia txog lub ntiaj teb extrasolar? Definition: Ib extrasolar ntiaj chaw , kuj hu ua exoplanet , yog a ntiaj chaw uas orbits lub hnub qub (piv txwv li yog ib feem ntawm lub hnub ci system) uas tsis yog peb tus kheej. Peb lub Hnub Ci System tsuas yog ib qho ntawm billions thiab ntau ntawm lawv feem ntau yuav muaj lawv tus kheej lub cev ntiaj chaw.
Ib yam li ntawd, cov kws tshawb fawb paub li cas exoplanets ua los ntawm?
Yeej: Los ntawm kev siv spectroscopy ntawm lub hnub qub uas ntws los ntawm lub ntiaj teb neeg txawv teb chaws, peb tuaj yeem ua tau kawm qhov muaj pes tsawg leeg ntawm lub ntiaj teb raws li lub wavelengths ntawm lub teeb tam sim no. Txhua lub ntsiab lus muaj cov qauv atomic, uas ua rau txhua tus nqus / cuam tshuam cov wavelengths sib txawv.
Muaj pes tsawg lub hnub ci ntxiv tau pom?
Txog tam sim no, ze li 4,000 exoplanets tau pom thiab suav tias "tau lees paub." Txawm li cas los xij, muaj ze li 3,000 lwm "tus neeg sib tw" exoplanet kev tshawb nrhiav uas xav tau kev soj ntsuam ntxiv txhawm rau hais kom paub tseeb seb puas muaj lossis tsis yog exoplanet yog tiag.
Pom zoo:
Dab tsi yog cov hlau nplaum uas ua los ntawm qhov kev npaj ntawm electrons yog dab tsi?
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Dab tsi yog qhov txawv ntawm microevolution thiab macroevolution Dab tsi yog qee qhov piv txwv ntawm txhua tus?
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