Main subject: Astronaut in a full set of white extravehicular spacesuit, floating with outstretched limbs in weightlessness, arm stretched upward. Scene: Vast outer space environment, a huge Earth-like planet floating at the top of the frame, misty light blue nebula permeating space, with tiny twinkling stars scattered around. Style: Realistic sci-fi atmosphere illustration, delicate picture texture, ethereal and distant atmosphere. Color tone: Overall cool blue color scheme, natural transition from light to deep haze blue, cobalt blue, navy blue, soft and unified colors. Lighting: Main light source is soft diffused cool light from the edge of the upper planet, nebula and stars have weak self-luminous effects, overall light is transparent and soft, astronaut is evenly illuminated by ambient light, no harsh strong shadows. Composition: Vertical layout, huge planet occupies the top area of the frame, astronaut is located at the upper center of the frame, sufficient blank space is left at the bottom of the frame, using a low-angle perspective to highlight the vastness and emptiness of the universe. Purpose: Atmosphere promotional material suitable for mobile vertical display, with sufficient design space reserved in the frame.