Ключевые слова: arms, astronomical, astronomy, astrophysics, background, bright, celestial, cluster, constellation, cosmic, cosmology, cosmos, deep space, exploration, galactic center, galaxy, infinite, intergalactic, light, light years, milky way, nebula, night, observing, outer space, pattern, rotation, science, sky, space, space study, spiral, star, starlight, stars, structure, swirl, telescope, universe, vast, whirlpool,