MORE NOCTILUCENT CLOUDS: For the second time in just a few days, noctilucent clouds (NLCs) have been sighted in Germany.
Noctilucant Clouds – on the rise for over 100 years!!!
Ghostly Night-Shining Clouds Get Their Glow from Meteor Smoke
Realtime Noctilucent Cloud Photo Gallery
THOUSANDS of fireballs in 2013!