First Night-Shining Clouds of 2012
Is This Strange Summer Phenomenon Becoming More Common? Each summer high-north residents are treated to noctilucent, or night-shining, clouds, such as these pictured above Riga, Latvia, earlier this month—among the first observed this year. Too thin and wispy to be seen during the day, noctilucent clouds are high enough that the sun‘s steeply raked post-sunset [...]
