A vintage-style illustration depicting an alien spacecraft resting on the rocky surface of a distant exoplanet. Two astronauts, clad in retro-futuristic space suits, stand nearby, examining the alien terrain. In the background, a majestic green gas giant looms over the horizon, casting an ethereal glow across the landscape. The sky is filled with vibrant hues, suggesting an otherworldly sunset, with stars beginning to twinkle as the day turns to night. The scene captures a sense of adventure and wonder, reminiscent of classic 1970s science fiction art.