astrophoto

The story

1. Proto-Indo-European*h₂eHs-
2. Proto-Indo-European*h₂stḗr
3. Proto-Hellenic*astḗr
4. Ancient Greekἀστήρ (astḗr)
5. Ancient Greekᾰ̓́στρον (ắstron)
6. Englishastro-
7. Proto-Indo-European*bʰeh₂-
8. Proto-Indo-European*bʰéh₂os
9. Proto-Hellenic*pʰáwos
10. Ancient Greekφᾰ́ος (phắos)
11. Ancient Greekφῶς (phôs)
12. Ancient Greekφωτο- (phōto-)
13. Englishphoto-
14. Proto-Indo-European*gerbʰ-
15. Proto-Hellenic*grə́pʰō
16. Ancient Greekγράφω (gráphō)
17. Englishphotographclip.
18. Englishphoto
19. English todayastrophoto

From astro- + photo.