Great telescopes such as the 200-incher on Palomar Mountain were designed for gathering faint starlight from a wide area and concentrating it in an image bright enough to make a photograph in a practical length of time. The limit of this method has probably been reached; big telescopes are wickedly expensive and hard to build. So forward-looking astronomers are now looking for other ways to brighten a telescopic image.
A promising new method uses an "electronic screen intensifier" developed at Johns Hopkins by Dr. Russell H. Morgan and Ralph Sturm. Primarily intended for...
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