Àm-o͘ bu̍t-chit

Tī thian-bûn-ha̍k kap ú-tiū-ha̍k, àm-o͘ bu̍t-chit (dark matter) chí 1 chióng ká-soeh (hypothetical) ê bu̍t-chit, iōng lâi kái-soeh khoàⁿ-ū bu̍t-chit (visible matter) só͘ piáu-hiān--chhut-lâi ê tāng-la̍t hiān-siōng, pau-koat gîn-hô/gîn-hô-thoân (galaxy cluster) tńg-se̍h ê sok-tō͘, gîn-hô-thoân sán-seng ê tāng-le̍k thàu-kiàⁿ (gravitational lens) hiān-siōng.