SANTANDER.- Eighty-three years later, after man landing on the moon and robots traversing Mars, after the construction of international space stations, after probes to Mercury, Venus, Jupiter, Saturn and beyond, another exhibition —The Cosmos of the Russian Avant-Garde: Art and Space Exploration, 1900-1930— pays homage to these valiant efforts to conquer space. A number of exhibitions and publications have been devoted to certain aspects of this theme, especially within the last decade, but this would seem to be the first attempt to concentrate on the modern Russian contribution. In any case, “The Cosmos of the Russian Avant-Garde: Art and Space Exploration, 1900-1930” is concerned not simply with artists’ renderings of outer space or with scientists’ visionary projects , but expressly with the intersection of visual art and cosmonautics. The Cosmos of the Russian Avant-Garde: Art and Space Exploration, 1900-1930 examines the relationship