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Ultra-realistic cinematic 16:9 YouTube thumbnail, hyper-detailed alien ocean planet (K2-18b) with glowing stormy blue-green atmosphere and bright cosmic light on horizon, golden James Webb Space Telescope with sharp reflective hexagonal mirrors on the side, dramatic glowing bold futuristic text overlay: “99.7% Proof” in neon yellow-gold, huge and centered, smaller glowing subtext “NASA Discovery” above it, ultra sharp 8K detail, high contrast, deep starry space background with purple nebula clouds, vibrant gold-blue color palette, polished professional studio design, designed for viral science/space YouTube channel, maximum click-through rate.