One should not use a word like this in a physical system, but I will do it anyway: During a lightning event, the atmosphere is plainly weird. It behaves weird, it looks weird, and weird stuff happens.
It is rather rare, and truth be told, if you do know about it, chances are you may regard it somewhat uncertainly as either tale or reality, not really knowing whether it is real or not.
Noctilucent Clouds (call them NLC for now) are middle atmosphere phenomena connected to icy particles of meteoritic origin, which occur exclusively during the summer months.
Seen from space, through eyes of satellites, the earth is a planet of oceans. However, all water on earth – in oceans, glaciers, lakes, the water in rivers – could be placed into the blue sphere to the left.
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