For an extensive collection of Noctilucent Clouds / Polar Mesopheric Cloud research, visit the AIM Mission Library: http://aim.hamptonu.edu/library/1library.html

For pictures and observing tips, visit the Noctilucent Cloud Observer's Network: http://www.nlcnet.co.uk/

For NLC photography tips and more pictures, visit: http://spaceweather.com/nlcs/

Channel 9 News report on Noctilucent Clouds