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Light Poles
So they get the necessary temperature is below -20, a good source of light, the lack of wind and the large number of ice crystals in the atmosphere.
Ice crystals in turn, should be largely flat shape (diamond-shaped).
If you fall in the air, they try to take a horizontal position and act as small mirrors.
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via Serge monk
Source:
Ice crystals in turn, should be largely flat shape (diamond-shaped).
If you fall in the air, they try to take a horizontal position and act as small mirrors.
2
3
4
5
6
7
8
9
10
11
via Serge monk
Source: