Last week, Earth-orbiting satellites detected the first noctilucent
clouds of the 2015 season. Now people on Earth are seeing them, too.
Photographers in Scotland recorded a fairly bright display of the
electric-blue clouds on May 28th. At the same time, radars have
detected intense echoes coming from the "noctilucent zone" 80 km to 90
km above Earth's surface--possibly coming from the clouds themselves.
Check http://spaceweather.com for more information and observing tips to help readers see NLCs for themselves in the weeks ahead.