abstract space scene background with soft pastel nebulae and twinkling stars. cosmos, galactic, aethereal, dreamy interstellar

space nebula star abstract background cosmos universe astronomy galactic celestial pastel twinkling cosmic stardust aethereal dreamy interstellar science fantasy sky night deep astro starlight glowing galaxy astral vibrant light stellar astrological bright milky way heavenly tranquil peaceful spreaded shimmer constellations outer exploration starfield formation clouds art dust travel bodies