Luminous Electric Blue Nebula in Outer Space

deep outer space panorama filled with countless tiny stars, a luminous electric-blue nebula stretching horizontally across the center like a soft cosmic cloud band, dark navy and black void surrounding it, subtle teal cyan highlights, scattered brighter star points, faint dust and gas textures, realistic astrophotography look, high detail, soft glowing diffusion, wide celestial background, no planets, no spacecraft, no text, no watermark