plural of dialytic telescope

An achromatic telescope in which the coloured dispersion produced by a single object lens of crown glass is corrected by a smaller concave lens, or combination of lenses, of high dispersive power, placed at a distance in the narrower part of the converging cone of rays, usually near the middle of the tube.

plural of solar telescope

plural of refracting telescope

plural of reflecting telescope

(astronomy) a star that is fainter than 7th magnitude in apparent magnitude, and therefore in most cases is not visible to the naked eye.

A telescope which, unlike most telescopes used for astronomical purposes, contains an arrangement of lenses presenting an erect (non-inverted) image to the observer, suitable for observation of objects on the Earth's surface.

(astronomy) An alt-azimuth mounted Newtonian reflector (Newtonian telescope); a type of reflecting telescope (reflector).

(astronomy) a type of refracting telescope (refractor) similar to the one used by Galileo Galilei

A house with multiple attachments connected serially, decreasing in size.