Noctilucent clouds: What are they and how can you see them? - Space.com

Noctilucent clouds: What are they and how can you see them? - Space.com
These strange clouds thrill skywatchers throughout the summer months.
Noctilucent clouds are rare high-altitude clouds that can only be seen under specific conditions. They appear during the summer months, after sunset, as thin wispy blue/silver streaks 'dancing' acros… [+10841 chars] Read More



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