Prompt code:
A retro-futuristic illustration of a friendly alien creature swimming in the depths of the ocean on the exoplanet K2-18b. The creature has a round body with large eyes and small limbs. It is surrounded by vibrant aquatic alien organisms. In the background, a transparent underwater futuristic habitat houses human explorers. The scene is filled with vibrant colors. The poster has the title "Explore K2-18b", and the text "the queen of the hycean worlds" and "within 39 parsecs of Earth".
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