A masterful, high-fidelity oil painting in the heroic Soviet Socialist Realism style of Aleksandr Deyneka, capturing a well-defined cosmic celebration. In the center stands a statuesque Goddess of the Cosmos, a beautiful and athletic allegorical woman with a joyful, radiant smile. She wears a solid, elegantly draped dark blue velvet gown adorned with fine, sharp golden embroidered stars. She stands naturally behind a long, heavy rustic wooden banquet table. With a clear, anatomically correct posture, she holds a heavy crystal decanter with both hands, pouring a realistic, flowing stream of amber cognac into a glass held by an engineer. Seated around the long table, a group of Soviet cosmonauts wearing distinct white spacesuits with clear CCCP lettering, and rocket engineers in dark wool coats, are laughing and raising their glasses. Each character has clearly defined hands, fingers, and sharp facial features, engaged in joyous camaraderie. In the background, completely separate from the figures, the clean and immense silhouette of an R-7 rocket rests on its launchpad under a deep, clear night sky where the Milky Way galaxy is visible. The lighting is warm and directional, coming from table lamps and searchlights, casting sharp highlights and deep shadows with thick, crisp impasto oil paint texture.