Gregorian telescope

noun

Definition of Gregorian telescope

  1. :  a reflecting telescope that has a paraboloidal primary mirror with a perforation through which light is reflected to the eyepiece and an ellipsoidal secondary mirror set beyond the focus and that produces an erect image but a small field of view

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Origin and Etymology of gregorian telescope

James Gregory †1675 Scottish mathematician and inventor + English -an


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a brief usually trivial fact

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