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U.S. Aerospace.
Orbiting Solar Observatory: one of a series of scientific satellites, launched between 1962 and 1975, that studied the sun at ultraviolet, x-ray, and gamma-ray wavelengths. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Orbiting Solar Observatory
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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