Ключевые слова: abstract, atom, atomic, background, badge, caution, contaminate, contaminated, danger, deterrent, disaster, energy, fission, green symbol, hazard, icon, light, milky way, night, night sky, nuclear, nuke, physics, plutonium, pollutant, pollution, power, radiation, radiation sign, radiation symbol, radioactive, radioactivity, ray, reactor, research, roentgen, safety, science, shiny, sign, sky, space, star, starlight, starry, stars, symbol, threat, uranium, warn,