A retro sci-fi scene depicting an alien spacecraft on the surface of a colorful exoplanet, with two astronauts in vintage space suits exploring the area. In the background, a massive green gas giant looms, its swirling clouds visible against the starry sky. The landscape features rugged terrain with unusual rock formations, and the spacecraft has a sleek, otherworldly design that reflects the artistic style of 1970s book covers. The colors are vibrant and slightly surreal, capturing the sense of adventure and mystery typical of that era's science fiction imagery.