siderostat

(redirected from Siderostats)
Also found in: Encyclopedia.
Related to Siderostats: coelostat, heliostat

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
[C19: from sidero-, from Latin sidus a star + -stat, on the model of heliostat]
ˌsideroˈstatic adj
Translations
Mentioned in ?
References in periodicals archive ?
Gautier likely got the idea from Jules Janssen, the pioneering solar astronomer who discovered helium in the Sun's spectrum; Janssen had built fixed horizontal solar telescopes with siderostats at Meudon.
A siderostat is a variation on the heliostat, a flat mirror that reflects sunlight in a constant direction as Earth rotates.
In the final design, the telescope's key moving element was a flat, 2-meter silvered glass mirror 27 centimeters thick in a fork-mounted siderostat.
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).
Siderostats are simply movable flat mirrors that redirect light to a central location where beams from separate mirrors may be combined.
In order to move beyond NPOI's already impressive resume of accomplishments, the Naval Research Lab (NRL) plans to replace the current siderostats and telescopes with larger diameter telescopes.