Ключевые слова: alpine, altitude, astronomical, astronomy, backcountry, celestial, constellation, cosmic, cosmos, dark, environment, exploration, galaxy, geography, hillside, horizon, interstellar, landscape, light, lunar, milky way, mountains, nature, night, outdoors, panorama, peak, ridge, scenery, scenic, sky, snow, space, starlight, stars, summit, terrain, travel, universe, vista, winter,