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coelostat
[ see-luh-stat ]
/ ˈsi ləˌstæt /
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noun Astronomy.
an apparatus consisting of a mirror driven by clockwork, used to enable a fixed telescope to keep the same area of sky in its field of view by compensating for the apparent rotation of the celestial sphere.
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Compare siderostat.
Origin of coelostat
Words nearby coelostat
coeliac, coeliac disease, coelom, coelomate, coeloscope, coelostat, coelurosaur, coemption, Coen, coenacle, coenesthesia
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022
How to use coelostat in a sentence
It will be laid comfortably flat on the ground, and the rays of light reflected into it by a coelostat.
Astronomical Discovery|Herbert Hall Turner
British Dictionary definitions for coelostat
coelostat
/ (ˈsiːləˌstæt) /
noun
an astronomical instrument consisting of a plane mirror mounted parallel to the earth's axis and rotated about this axis once every two days so that light from a celestial body, esp the sun, is reflected onto a second mirror, which reflects the beam into a telescopeCompare siderostat
Word Origin for coelostat
C19 coelo-, from Latin caelum heaven, sky + -stat
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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