Gregorian telescope

Origin of Gregorian telescope

1755–65; named after James Gregory; see -ian
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British Dictionary definitions for gregorian telescope

Gregorian telescope

noun
  1. a form of reflecting astronomical telescope with a concave ellipsoidal secondary mirror and the eyepiece set behind the centre of the parabolic primary mirror

Word Origin for Gregorian telescope

C18: named after J. Gregory (died 1675), Scottish mathematician who invented it
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