Noctilucent clouds.
In the Cloud Appreciation Society photo gallery you can see something similar.
http://cloudappreciationsociety.org/?s= ... clouds&g=1
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- Tue Oct 01, 2013 12:40 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Mysterious Green Patches on the Sky (2013 Sep 30)
- Replies: 275
- Views: 523366