Definitions from Wiktionary (Gregorian telescope)
▸ noun: A type of reflecting telescope having two concave mirrors: the primary mirror (a paraboloid) collects the light and brings it to a focus before the secondary mirror (a ellipsoid), where it is reflected back through a hole in the centre of the primary, and thence out the bottom end of the instrument, where it can be viewed with the aid of the eyepiece.
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▸ noun: A type of reflecting telescope having two concave mirrors: the primary mirror (a paraboloid) collects the light and brings it to a focus before the secondary mirror (a ellipsoid), where it is reflected back through a hole in the centre of the primary, and thence out the bottom end of the instrument, where it can be viewed with the aid of the eyepiece.
▸ Words similar to Gregorian telescope
▸ Usage examples for Gregorian telescope
▸ Idioms related to Gregorian telescope
▸ Wikipedia articles (New!)
▸ Words that often appear near Gregorian telescope
▸ Rhymes of Gregorian telescope
▸ Invented words related to Gregorian telescope