充滿活力的復古未來主義海報，火箭留下彩虹軌跡，行星和太空人頭盔在星空背景下

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A spectacular and vibrantly colorful retro futurism vertical poster, a bold composition featuring a chunky 3D cartoon rocket ship in glossy candy red with bright yellow fins and a round porthole window launching upward trailing a thick swirling rainbow exhaust cloud in electric pink cyan lime green and orange, surrounding the rocket oversized 3D planets each a different vivid color — a giant striped Jupiter in warm orange and cream, a ringed Saturn in pastel lilac with a glowing gold ring, a tiny Earth in vivid turquoise and emerald, dozens of glossy 3D stars in bright yellow and white scattered across a deep cobalt blue sky gradient background that shifts from rich royal blue at the top to warm violet at the bottom, floating 3D astronaut helmet in chrome with a rainbow visor reflection, bold chunky rounded typography at the top reading "SHOOT FOR THE STARS" in massive gradient letters shifting from hot pink to electric yellow, smaller bouncy subtitle below "Dream big · Launch bigger", tiny sparkle and comet trail symbols scattered across the composition, ultra-vivid saturated colors throughout, premium 3D illustration quality, 9:16 vertical ratio