astrophotograph

Etymology tree
Proto-Indo-European *h₂eHs-
Proto-Indo-European *-tḗr
Proto-Indo-European *h₂stḗr
Proto-Hellenic *astḗr
Ancient Greek ἀστήρ (astḗr)
Ancient Greek ᾰ̓́στρον (ắstron)der.
English astro-
Proto-Indo-European *bʰeh₂-
Proto-Indo-European *bʰéh₂os
Proto-Hellenic *pʰáwos
Ancient Greek φᾰ́ος (phắos)
Ancient Greek φῶς (phôs)
Ancient Greek φωτο- (phōto-)der.
English photo-
Proto-Indo-European *gerbʰ-
Proto-Hellenic *grə́pʰō
Ancient Greek γράφω (gráphō)
Ancient Greek -γρᾰ́φος (-grắphos)der.
English -graph
English photograph
English astrophotograph
From astro- + photograph.