plural of telescopic star

A device used e.g. on a rifle in aiming a projectile, through which the person aiming looks at the intended target.

(astronomy) A telescope that can point vertically at the zenith

plural of telescopic sight

Synonym of transit instrument

(astronomy) An instrument that detects X-rays originating from outside the Earth's atmosphere.

(astronomy) A type of reflecting telescope employing a parabolic liquid mirror made by spinning a pool of reflective liquid.

(figuratively) With the opposite of what is the correct conclusion.