astroscopic

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*speḱ-
8. Proto-Indo-European*spéḱyeti
9. Proto-Hellenic*sképt͏̌omai
10. Ancient Greekσκέπτομαι (sképtomai)
11. Ancient Greekσκοπός (skopós)
12. Ancient Greekσκοπέω (skopéō)
13. English todayastroscopic

From astro- + -scopic.