A MYSTERY IN THE MESOSPHERE: This summer, something strange has been happening in the mesosphere--a layer of Earth's atmosphere so high that it nearly touches space. The mesosphere is the realm of noctilucent clouds, electric-blue glowing forms that are seeded by meteor smoke. Lately, these clouds have been glowing more brightly than usual. What's happening up there? Visit today's edition of Spaceweather.com for the answer.
Above: This outburst of bright noctilucent clouds in late July signaled to observers that something unusual might be happening in the mesosphere. Photo credit: Kairo Kiitsak of Simuna, Estonia.
