Coelostat (noun) Definition, Meaning & Examples

noun Astronomy.
  1. 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.
noun
  1. 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 telescope
Coelostat (noun) Definition, Meaning & Examples

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