Reflecting or reflector telescopes utilise a single mirror or ... the light from the main or 'primary' mirror is deflected by a small flat secondary mirror, set at such an angle that it is sent ...

He reached a point of diminishing returns beyond which enlarging the image made what was seen through the telescope too small to be of ... was the first working reflecting telescope.

Radio telescopes are one of the more high-profile pieces of scientific apparatus. There is an excitement to stories of radio astronomers of old probing the mysteries of the Universe on winter ...

Though still only in the prototype stage, this flat lens could one day be used on space telescopes, and perhaps even on amateur telescopes. Engineers and astronomers at the University of Utah have ...