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Shuttle Exhaust Tied to PMCs Over Scandinavia
Shuttle Exhaust Tied to PMCs Over Scandinavia

Noctilucent clouds – also known as polar mesospheric clouds (PMCs) over Wismar, Germany on July 9, 2011. These clouds shine brightly even during the night.

Shuttle exhaust made of water vapor formed particularly bright PMCs over Scandinavia. Credit: Leibniz-Institute of Atmospheric Physics

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Page Last Updated: August 14th, 2013
Page Editor: Holly Zell