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siderostat

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siderostat [ˈsaɪdərəʊˌstæt]
n
(Astronomy) an astronomical instrument consisting essentially of a plane mirror driven about two axes so that light from a celestial body, esp the sun, is reflected along a constant direction for a long period of time See also heliostat Compare coelostat
[from sidero-, from Latin sidus a star + -stat, on the model of heliostat]
siderostatic  adj
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This pair of early A dwarfs, first noted at Narrabri (Hanbury Brown et al 1974) has now been resolved using the VINCI instrument and two of the VLTI siderostats (Kellerer 2008).
Using the Innes telescope again by Argyle, R.W. / Monthly Notes of the Astronomical Society of Southern Africa
 
 
 
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