Further subcategories under these two main branches of astronomy include planetary astronomy, galactic astronomy, or physical cosmology.
fˈɜːðɚ sʌbkˈæɾɪɡɚɹiz ˌʌndɚ ðiːz tˈuː mˈeɪn bɹˈæntʃᵻz ʌv ɐstɹˈɑːnəmi ɪŋklˈuːd plˈænɪtˌɛɹi ɐstɹˈɑːnəmi, ɡɐlˈæktɪk ɐstɹˈɑːnəmi, ɔːɹ fˈɪzɪkəl kɑːzmˈɑːlədʒi.