Ключевые слова: astronomy, background, beautiful, blue, circle, clockwise, dark, exposure, galaxy, illustration, immense, landscape, light, light at the horizon, long, mercury, moon, motion, mountain, nature, night, night of darkness, no light, no one, north, north star, orbit, polaris, reservoir, revolve around yourself, river, rotation, science, sky, space, star, star trail, starry, sunset, take a long time, the article, the route, time, trail, trails, tree, twilight, universe, venus, world revolves,