Envision a retro-inspired scene reminiscent of 1970s science fiction book covers, featuring a sleek, enigmatic alien spacecraft resting on the rocky surface of an exoplanet. Two astronauts, clad in vintage space suits with reflective visors, stand nearby, gazing in awe. In the background, a majestic green gas giant looms large against the star-studded void, casting an ethereal glow over the alien landscape. The sky is a swirl of vibrant, surreal colors, adding a dreamlike quality to the setting, while strange, twisted rock formations and peculiar flora punctuate the horizon, enhancing the sense of cosmic adventure and mystery.