Ib nrug ntawm 1,000 parsecs (3, 262 ly) yog txhais los ntawm kiloparsec (kpc). Astronomers feem ntau siv kiloparsecs los qhia qhov deb ntawm qhov chaw ntawm lub galaxy, los yog nyob rau hauv pab pawg ntawm galaxies. Yog li, piv txwv li: Ib qho parsec yog kwv yees li ntawm 3.26 lub teeb xyoo.
Qhov twg yog chav tsev ntawm parsec?
parsec, unit rau kev nthuav qhia qhov deb ntawm cov hnub qub thiab galaxies, siv los ntawm cov kws tshaj lij astronomers. Nws sawv cev qhov kev ncua deb ntawm lub vojvoog ntawm lub ntiaj teb lub orbit subtends lub kaum sab xis ntawm ib tug thib ob ntawm arc.
Puas yog parsec ib chav tsev ntawm lub sijhawm?
Hmoov tsis zoo, zoo li qhov zoo sib xws siv 'lub teeb-xyoo', qhov parsec yog ib chav tsev ntawm qhov ntev, tsis yog lub sijhawm Ib qho parsec yog sib npaug li ntawm 3.26 lub teeb xyoo lossis roughly 31 trillion mais (19 trillion mais). Chav tsev muaj nws lub hauv paus hauv ib qho ntawm thawj txoj hauv kev txiav txim siab qhov kev ncua deb mus rau lub hnub qub.
Puas yog parsec ib chav tsev ntev lossis ib chav ntawm kaum?
Tab sis qhov parsec yog dab tsi? Yeej, nws yog ib chav tsev ntawm qhov ntev siv los ntsuasastronomically loj nrug ntawm cov khoom dhau ntawm peb lub Hnub Ci. Ib parsec yog qhov kev ncua deb ntawm ib chav astronomical subtends lub kaum sab xis ntawm ib arcsecond.
parsec xam li cas?
Parsec --- Ib qho parsec txhais tau tias yog qhov kev ncua deb rau ib qho khoom uas muaj (ib xyoos ib zaug) parallax ntawm ib thib ob ntawm arc. Hais txog lub kaum sab xis me me, 1 parsec=1 AU / 1 arc thib ob (qhia hauv radians). … Then 1 parsec=1 AU / (1/206, 265), or 206, 265 AU.
