Issued in November 1957, this historic Soviet set celebrates the successful launch of Sputnik-1, the world’s first artificial satellite, marking the beginning of the space age. The design features a symbolic female figure reaching toward the heavens, representing humanity’s advance into space, with Kremlin towers and starry cosmic imagery in the background. The set consists of three denominations (20k, 60k, and 1 ruble), each printed in distinct color tones, making it visually striking and historically significant. These stamps are among the earliest philatelic tributes to space exploration and remain highly collectible worldwide. Well-centered mint examples with full original gum are especially desirable for thematic space, science, and Cold War history collections.