Today, that distinction has mostly disappeared and the terms "astronomer" and "astrophysicist" are interchangeable.
tədˈeɪ, ðæt dɪstˈɪŋkʃən hɐz mˈoʊstli dˌɪsɐpˈɪɹd ænd ðə tˈɜːmz "ɐstɹˈɑːnəmɚ" ænd "ˌæstɹəfˈɪzɪsˌɪst" ɑːɹ ˌɪntɚtʃˈeɪndʒəbəl.