An Etymological Dictionary of Astronomy and Astrophysics

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Roemer delay

درنگ ِ رؤمر

derang-e Rømer

Fr.: retard de Rømer

A time delay caused by the light travel across a → dynamical system. The finite → speed of light causes a delay, for example, between the → primary eclipse and the → secondary eclipse in → binary systems.

Named after Ole Rømer (1664-1710), who discovered the finite speed of light, → Roemer's measurement; → delay.

An Etymological Dictionary of Astronomy and Astrophysics
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