0 a type of telescope (= a device for making objects that are far away look closer and larger) that uses a mirror or mirrors to reflect light and form an image: --
Isaac Newton built the first reflecting telescope in 1668.
This reflecting telescope which had a 60 cm mirror, operated for nine months until its supply of coolant (liquid helium) ran out.
It is used primarily to make different kinds of mirrors including early reflecting telescope optical mirrors.
The 1908 addition included a second dome and space for a new 37 1/2-inch reflecting telescope.
It is notable in having its own astronomy department complete with its own reflecting telescope mounted within a free-standing observatory on the school grounds.
One simple layout of an astronomical interferometer is a parabolic arrangement of mirrors, giving a partially complete reflecting telescope (with a sparse or dilute aperture).
He also measured temperatures of stars using a 36-inch diameter reflecting telescope.
Within a few decades, the reflecting telescope was invented, which used mirrors.
The most common tool is the reflecting telescope but with a detector sensitive to infrared wavelengths.
