Small Astronomy Satellite 2

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The Small Astronomy Satellite 2, also known as SAS-2, SAS B or Explorer 48, was a NASA gamma ray telescope. It was launched on 15 November 1972 into the low Earth orbit with a periapsis of 443 km and an apoapsis of 632 km. It completed its observations on 8 June 1973.

Excerpt from the Wikipedia article “Small Astronomy Satellite 2”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Mrs. Marjorie R. Townsend Project Manager NASA Goddard Space Flight Center, Dr. Carl E. Fichtel Project Scientist NASA Goddard Space Flight Center, Dr. Nancy G. Roman Program Scientist NASA Headquarters, Public domain, via Wikimedia Commons.