Vim li cas feem ntau galaxies kauv?
Vim li cas feem ntau galaxies kauv?

Video: Vim li cas feem ntau galaxies kauv?

Video: Vim li cas feem ntau galaxies kauv?
Video: Vim li cas cov ntseeg ho caiv tsis noj ntshav? 2024, Hlis ntuj nqeg
Anonim

Astronomers ntseeg li ntawd cov galaxies muaj kauv arm vim cov galaxies rotate - los yog tig ib ncig ntawm lub hauv paus axis - thiab vim yog ib yam dab tsi hu ua "nthwv dej ceev." A kauv galaxy rotation, los yog spin, khoov cov nthwv dej rau hauv kauv . Cov hnub qub dhau los ntawm nthwv dej thaum lawv orbit galaxy chaw.

Ib yam li ntawd, nws tau nug, puas yog feem ntau galaxies kauv?

Kauv galaxies ua roughly 72 feem pua cov galaxies uas cov kws tshawb fawb tau pom, raws li kev tshawb fawb 2010 Hubble Space Telescope. Feem ntau cov kauv galaxies muaj lub hauv paus bulge puag ncig los ntawm lub tiaj tus, rotating disk ntawm hnub qub.

Ib sab saum toj, ua li cas kauv galaxies khaws lawv cov duab? Yuav ua li cas galaxies xws li M33 thiab peb Milky Way khaws lawv cov kauv zoo li qub ? Astronomers qee zaum hu qhov no "qhov teeb meem cua" ntawm lub kauv caj npab. Nws tau raug pom tias sab hauv ntawm cov galaxies rotate sai dua qhov chaw sab nraud. Lub tswv yim yog tias tag nrho disk ntawm ib galaxy yog sau nrog cov khoom.

Ib sab saum toj no, vim li cas kauv galaxies feem ntau tshwm sim?

Kev tshawb fawb tshiab pom tias kauv caj npab yog tus kheej-perpetuating, pheej, thiab xav tsis thoob nyob ntev. Kauv galaxies ua roughly 77 feem pua ntawm cov cov galaxies uas cov kws tshawb fawb tau pom. Vim elliptical cov galaxies yog ua los ntawm cov laus, dimmer hnub qub, lawv yog ntau nyuaj rau qhov chaw.

Dab tsi yam ntxwv piav qhia txog kauv galaxies?

Kauv Galaxies Lub disk yog ib cheeb tsam ntawm lub hnub qub tsim thiab muaj ntau yam roj thiab hmoov av. Nws yog dominated los ntawm cov hluas, xiav Population kuv hnub qub. Lub hauv paus bulge yog tsis muaj roj thiab hmoov av.

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