
English word astro- comes from Translingual physician, Proto-Indo-European *h₂eHs-, Proto-Indo-European - tḗr, Proto-Indo-European *h₂eh₁s-, Ancient Greek νοῦμμος, and later Proto-Indo-European *h₂stḗr (Star.)
physician (Translingual)
*h₂eHs- (Proto-Indo-European)
hearth; ash
- tḗr (Proto-Indo-European)
*h₂eh₁s- (Proto-Indo-European)
νοῦμμος (Ancient Greek)
Spanish (Translingual)
botanist (Translingual)
*h₂stḗr (Proto-Indo-European)
Star.
*astḗr (Proto-Hellenic)
Star.
ἀστήρ (Ancient Greek)
ἄστρον (Ancient Greek)
astro- (English)
Celestial bodies: fixed stars, wandering stars (planets), etc.; astronomy.