Astronomers heard big news: Astro-Physicist Otto Struve and his staff at the University of Chicago's Yerkes Observatory had perfected a powerful new spectrograph for photographing invisible infra-red radiations from the stars. Since the instrument can be used in broad daylight, stargazers can now go on a 24-hour shift.
Photographing infra-red (heat) rays is not new, but Professor Struve's spectrograph is much more sensitive than any previously made. Using new red-sensitive plates developed during the war, and a gold-coated mirror (which reflects infrared rays better than a silver-plated one), the instrument can catch rays...
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