galaxy nebula space background purple blue stars
Prompt
A photorealistic deep-space nebula background filling the frame, an irregular translucent ring of cosmic gas and dust glowing against a pure black starfield. The nebula has a soft oval-shell structure with wispy edges, smoky internal clouds, and a brighter central star cluster, rendered in luminous purple, electric blue, magenta, rose, amber, and pale white. Tiny blue-white and gold stars are scattered throughout with subtle diffraction sparkle, while darker dust pockets create depth and contrast. Centered composition with generous black space around the glowing form, calm awe-inspiring scientific mood, crisp but natural astrophotography detail, no overlays. Simulated space-telescope capture, long exposure, high dynamic range without halos, deep focus, ultra-clean 8k texture suitable as a background.
Negative Prompt
readable text, telescope name, object catalog number, logos, watermarks, labels, scale bar, compass arrows, filter legend, borders, UI overlay, famous landmark, people, faces, spacecraft, planets, cartoon style, oversaturation, HDR halos, artificial glow, pixelation, compression artifacts, melted stars