The Space and Missile Systems Center's Space Test Program Satellite-4 (STPSat-4) deploys from the International Space Station at 11:20 p.m., Jan. 28, 2020. The suitcase-sized satellite is a test-bed with five experimental payloads to study advanced spacecraft communications, navigation, power systems, as well as space weather and improved small-satellite tracking capability. (Photo courtesy of NASA)

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Photo by: NASA |  VIRIN: 200128-F-ZZ000-0001.JPG