(in cooperation with AstroPilot.info)
Photograph Explanation:

Noctilucent Clouds. This image was taken 1 July 2003 while airborne at 38,000 feet. From this position over the mid-North Atlantic Ocean (near 54N, 034W) there would have been very few other observers. How do you come home and explain such a majestic humbling sight to your friends and family? What words can you use to explain a luminous textured film of contrasting silvery-blue engulfing you overhead from space? An incredible sight! Photo: BrianWhittaker (.com) as seen on www.SpaceClouds.info.