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Definition of Coelostat
1. Noun. Optical device used to follow the path of a celestial body and reflect its light into a telescope; has a movable and a fixed mirror.
Generic synonyms: Optical Device
Definition of Coelostat
1. Noun. (astronomy) A device that rotates a telescope so as to keep its orientation constant with relation to the (stars). ¹
¹ Source: wiktionary.com
Definition of Coelostat
1. [n -S]