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coronagraph telescopic equipment that blocks light from a star so that the star's corona and objects close to the star can be resolved.
micrometer1 an instrument for measuring minute distances, angles, diameters, and the like in telescopic and microscopic images. [1/2 definitions]
Telephoto trademark for a photographic system that uses telescopic lenses to produce large images of distant objects. [1/2 definitions]
theodolite a precision instrument used in surveying that has a telescopic sight for measuring horizontal and vertical angles.
transit the passage of a celestial body across the face of another or across the meridian or the telescopic field of an observer. [1/7 definitions]