Create one finished standalone photographic website background image, 16:9 landscape, approximately 2048 by 1152 pixels. Theme: Astral atlas. Scene: A narrow river of amber interstellar dust curves from the lower left into a distant vanishing point, with a few tiny white stars. Art direction: Cinematic astronomical concept art with physically convincing star light, delicate dust and extraordinary scale. Deep black, icy silver, amber and restrained red. Avoid purple, rainbow nebula wallpaper and oversized glitter. Composition: retain generous low-detail right space suitable for overlaying website copy, adapting subject placement naturally. This is the actual background artwork, not a website mockup. No text, letters, typography, logos, borders, collages, grids or watermarks. Full-bleed, polished, richly detailed at native resolution.