Definición de optical double en inglés:

optical double

Saltos de línea: op|tic¦al double

sustantivo

Astronomy
  • A group of two stars which appear to constitute a double star due to their being in the same line of sight as seen from the earth, but are actually at different distances.
    Más ejemplos en oraciones
    • At first he figured that such pairs consisted of two stars vastly distant from each other but coincidentally lying along a single line of sight - a visual phenomenon we now call optical doubles.
    • The physical doubles (or binary stars) are much more numerous than the optical doubles.

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Palabra del día coloratura
Pronunciación: ˌkɒlərəˈtjʊərə
noun
elaborate ornamentation of a vocal melody