from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A device that rotates a telescope so as to keep its orientation constant with relation to the stars.
from the GNU version of the Collaborative International Dictionary of English
- n. an optical instrument used to follow the path of a celestial body and reflect its light into a telescope; it has a movable and a fixed mirror.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. optical device used to follow the path of a celestial body and reflect its light into a telescope; has a movable and a fixed mirror
It is the pilot's duty to juggle his ship on her gyros and flywheel with his eyes glued to a measuring telescope, a 'coelostat', to be utterly sure to the extreme limit of the accuracy of his instruments that his ship is aimed exactly right when the jet fires.
The "coelostat," in the form given to it by Professor Turner, has proved an invaluable adjunct to eclipse-equipments.
The problem appeared to be the coelostat, a mirror attached to the large astrographic telescope.
But soon after arriving at Sobral that April, Crommelin and his cohorts discovered a serious optical defect on the coelostat mirror for the biggest and the best of the telescopes.
One of them is the coelostat, the instrument used in telescopes to keep the images of the stars in place for arbitrarily long periods of exposures.
He contributed to astronomy with his invention of the coelostat, a device which immobilizes the image of a star and its surrounding stars so that a photograph may be taken.
Through the Stone's coelostat the cause could easily be seen; the War God was tumbling end over end, performing one full revolution every thirty-two seconds to provide centrifugal 'artificial gravity' to coddle the tender stomachs of her groundhog passengers.
He kept his face glued to the eyeshade of the coelostat.
On May 29, 1919, one of Gibbs’s gizmos a sun-tracking coelostat, to be precise was used at Sobral, a remote spot in northeast Brazil and one of two sites chosen by the Royal Astronomical Society to observe the total solar eclipse on that rare day.