Noctilucent clouds?

Started Jun 20, 2012 | Discussions thread
gwales Regular Member • Posts: 122
Re: Noctilucent clouds?

Amazing! That's the second time in my life I saw the word 'noctilucent', and it occurred in less than 5 minutes. This was the first time:

"the noctilucent clouds in the Earth's mesosphere"

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Geoff Wales

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