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Title: Konstantin Tsiolkovsky stamp
Caption: Soviet stamp commemorating Konstantin Tsiolkovsky (1857-1935), a Russian and Soviet rocketry pioneer, considered to be one of the founding fathers of astronautics. Issued in 1964.
Credit: Album / Science Source / GIPhotoStock
Image size: 2987 × 4231 px | 36.2 MB
Print size: 25.3 × 35.8 cm | 1176.0 × 1665.7 in (300 dpi)