galaxy nebula space background purple blue stars
Prompt
Photorealistic deep-space background showing a luminous oval nebula suspended in black cosmic space, centered in a vertical 4:5 frame. The nebula forms an irregular translucent shell with wispy gas clouds, brighter creamy-white and pale amber edges, and a glowing interior of magenta, rose, violet, and deep blue dust. Tiny blue-white and warm yellow stars are scattered throughout, with a few sharper starbursts near the center for depth. Mood is mysterious, expansive, and serene, like a clean astronomy long-exposure image intended as a texture or wallpaper. High contrast against true black, subtle grain, natural cosmic color, no overlays. Captured as if through a deep-space observatory telescope, long exposure, ultra-sharp stars, soft volumetric nebula detail.
Negative Prompt
readable text, telescope names, catalog numbers, logos, watermarks, compass arrows, scale bars, coordinate grids, labels, UI overlays, borders, frames, famous landmark, people, spacecraft, planets, oversaturated colors, HDR halos, smeared stars, artificial patterns, low resolution, real archival image reproduction