Ключевые слова: america, arch, architecture, astronomer, astronomy, attractions, blue, brick, building, chamberlin, city, cityscape, cloud, clouds, colorado, country, cultural, denver, destinations, dome, facade, famous, field, grass, green, historic, house, landmark, landscape, meadow, modern, monuments, nature, observation, observatory, park, planetarium, red, research, scenic, science, sky, skyline, space, states, stone, summer, telescope, tourism, tourist, travel, tree, trees, united, urban, usa, view,