Herschelian telescope

noun

Definition of Herschelian telescope

: a reflecting telescope in which the need for a secondary mirror is avoided by tilting the primary mirror slightly and thereby throwing the focused image to the side where it can be observed without obstruction to the incoming light rays

called also off-axis reflector

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“Herschelian telescope.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Herschelian%20telescope. Accessed 21 Sep. 2020.

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