Space Defenders photo cards were issued in 1965 by the United States Air Force. The 20-card black-and-white collection features "Military Missiles and Satellites Launched From Cape Kennedy Air Force Station, Florida." The series was produced by the Office of Information for the Air Force East Test Range at Patrick Air Force Base, Florida.

Complete sets of Space Defenders were distributed in 20-card paper envelope packs and perforated sheet variants. The non-perforated sets include a red header card. Each perforated card measures approximately 2.25 x 3.25 inches. The card backs contain mission information and technical specifications.