What is another word for coelostat?
Pronunciation: [sˈiːləstˌat] (IPA) 
A coelostat is an astronomical instrument that uses mirrors to reflect and track the motion of the sun across the sky. Synonyms for this specialized instrument include heliostat, sun follower, and solar tracker. Heliostats are commonly used in concentrated solar power plants to direct sunlight to a central receiver that converts the sun's heat into electricity. Sun followers and solar trackers are also used in solar energy installations, but instead of reflecting the sun's rays, they adjust the orientation of solar panels to maximize their exposure to sunlight. While each of these instruments serves a different purpose, they all help harness the power of the sun for human energy needs.
