Where does “astrolabe” come from?

astrolabe (Middle French) comes from Ancient Greek ἀστρολάβος, from Ancient Greek ἄστρον, from Ancient Greek ἀστήρ, from Proto-Hellenic astḗr, from Proto-Indo-European h₂stḗr, from Proto-Indo-European h₂eHs- — to be/become dry; to burn, to glow; hearth.

Ancestry of “astrolabe”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	ἀστρολάβος	armillary sphere; planisphere
2	Ancient Greek	ἄστρον	A celestial body
3	Ancient Greek	ἀστήρ	a celestial body; illustrious person; starfish
4	Proto-Hellenic	astḗr	star
5	Proto-Indo-European	h₂stḗr	star
6	Proto-Indo-European	h₂eHs-	to be/become dry; to burn, to glow; hearth

Words derived from “astrolabe”

astrolabe
astrolabic
astrelabie

Every word from Proto-Indo-European h₂eHs- →Every word from Proto-Indo-European h₂stḗr →Every word from Proto-Hellenic astḗr →