Interferometer

An interferometer consists of two or more separate telescopes that combine their signals almost as if they were coming from separate portions of a telescope as big as the two telescopes are apart.

The resolution of an interferometer approaches that of a telescope of diameter equal to the largest separation between its individual elements (telescopes). However, not as many photons are collected by the interferometer as would be by a giant single telescope of that size.

Some famous interferometers are


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