Definición de Gregorian telescope en inglés:

Gregorian telescope

Silabificación: Gre·go·ri·an tel·e·scope

sustantivo

  • 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.
    Más ejemplos en oraciones
    • 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.

Origen

mid 18th century: named after James Gregory (1638–75), the Scottish mathematician who invented it.

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Palabra del día maelstrom
Pronunciación: ˈmeɪlstrəm
noun
a powerful whirlpool in the sea