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Encyclopedia

A C E G I L M N O P R S T U V
Aurora Blue, green, red. Twisting, diffuse or curtain-like… Auroras occur when the Earth’s magnetosphere traps or diverts the charged particles from the Sun.
The colour of aurora The colour of polar lights (or auroras) teaches us something about the chemical elements in our atmosphere.
Aurora in the atmosphere A multidisciplinary science based on observations of the atmospherical environment (terrestrial and extraterrestrial).
Smog Large cities, as well as the main industrial regions stand out as severely polluted and are consequently clearly identifiable on air pollution maps.
Earth's atmosphere Gases in Earth’s atmosphere (like nitrogen, oxygen and ozone) filter out harmful UV radiation