The interferometer was adapted for use in conjunction with two or more telescopes to improve the resolution, or detail, of astronomical images in a process called interferometry.
Because Earth is round, the same light wave from a celestial object in space will reach one telescope before the other. This means that at one instant, a wave front's trough could arrive at one telescope while the crest is arriving at another.
The interferometer helps not only to realign the signals, but also to amplify them and to reduce glare or noise. It is also used to precisely measure the distances and sizes of stars or galaxies.
