GNU Webster's 1913
- adj. (Opt.) a form of reflecting telescope, named from Prof. James Gregory, of Edinburgh, who perfected it in 1663. A small concave mirror in the axis of this telescope, having its focus coincident with that of the large reflector, transmits the light received from the latter back through a hole in its center to the eyepiece placed behind it.
- n. a form of reflecting telescope. See under Gregorian.
- n. a reflecting telescope that has a paraboloidal primary mirror and a hyperboloidal secondary mirror; light is brought to a focus through an aperture in the center of the primary mirror
Sorry, no example sentences found.
‘Gregorian telescope’ hasn't been added to any lists yet.
Looking for tweets for Gregorian telescope.