Ключевые слова: astronomy, atmosphere, atmospheric, baltic sea, beach, bright, climate, cloud, clouds, cloudscape, coast, coastline, copy space, dark, heaven, illuminate, latvia, luminescence, luminous, mesosphere, midnight, mystery, nature, night, noctilucent, observation, outdoors, pagan, phenomenon, polar, promenade, riga, sand, sand dune, scandinavia, sea coast, seaside, shining, shore, silver, silvery, sky, star, starlight, starry, stars, summer solstice, sunrise, sunset, twilight,