Far-Infrared Observations of the Night Sky
- 13 June 1969
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 164 (3885) , 1271-1273
- https://doi.org/10.1126/science.164.3885.1271
Abstract
We have flown a telescope cooled to liquid-helium temperatures and made far-infrared observations of the night sky. A gallium-doped germanium detector, sensitive from 5.2 to 130 micrometers, detected a minimum signal of 10 -9 watt per square centimeter per steradian referred to 100 micrometers. The origin of this signal can be instrumental, atmospheric, interplanetary, or interstellar. We can place a firm upper limit on the color temperature of a dilute cosmic background flux.Keywords
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