Color photo of the Echo II, NASA’s Balloon Satellite. Photo: Fritz Goro. In: LIFE Science Library - Matter by Ralph E. Lapp and the Editors of TIME - LIFE BOOKS, 1963 (hungarian edition by Műszaki Könyvkiadó,1973)
The 135-foot rigidized balloon satellite was sent into orbit as a passive communications experiment by NASA on January 25, 1964. When folded, the satellite was packed into a 41-inch diameter canister.