Definition of Gregorian telescope in English:
An early reflecting telescope in which light reflected from a concave elliptical secondary mirror passes through a hole in the primary mirror. It was rendered obsolete by the introduction of Newtonian and Cassegrain telescopes.
- Therefore, for certain applications, Gregorian telescopes have desirable advantages over other telescope designs.
- There are two different classes of two-mirror telescopes: Cassegrain telescopes and Gregorian telescopes.
- He subsequently became the most successful London manufacturer of Gregorian telescopes, which were named after their original inventor.
Mid 18th century: named after James Gregory (1638–75), the Scottish mathematician who invented it.
Definition of Gregorian telescope in:
- US English dictionary
What do you find interesting about this word or phrase?
Comments that don't adhere to our Community Guidelines may be moderated or removed.
Most popular in the US
Most popular in the UK
Most popular in Australia
Most popular in Malaysia
Most popular in Pakistan