Ключевые слова: art, astronomical, astronomy, blue, building, color, colorful, contour, cosmos, design, discovery, equipment, galaxy, graphic, icon, illustration, institution, isolated, lens, line, linear, lineart, look, night, observation, observatory, observe, optical, outline, planet, red, research, satellite, science, scientific, sign, sky, space, square, star, symbol, technology, telescope, universe, white,