Single realistic nebula cloud, pastel cosmic gas formation

single realistic nebula cloud, pastel cosmic gas formation, soft pink lavender baby blue mint and peach tones, real astrophotography look, luminous interstellar dust, subtle stardust, natural celestial glow, highly detailed, rich dimensional depth, realistic light diffusion, photographic texture, glossy atmospheric feel, elegant luxury collage element, isolated on pure white background, centered composition, fully visible, fully contained within the frame, extra large white margin around the subject, lots of negative space, subject scaled much smaller in frame, no cropped edges, crisp clean edges, sharp focus, no planets, no moon, no text, no watermark --ar 1:2 --v 8