
Matt Robinson in Sunderland, U.K., saw a grand display of electric-blue noctilucent clouds on July 7, 2014. They are sometimes called night-shining clouds.
The secrets of night-shining clouds: Everything you need to know
Europe got a fabulous display of noctilucent clouds on July 3
NASA’s Astronomy Picture of the Day (APOD) is featuring noctilucent clouds today, too