Wednesday, June 3, 2009

Mysterious night-shining clouds may peak this year

First reported in 1885, "noctilucent", or night-shining, clouds form so high in the Earth's atmosphere they are lit even after the sun has set. The first northern hemisphere clouds of the year were spotted last week by sky watchers, and the week before that by a NASA spacecraft (Image: Ian Brantingham)

The lull in the sun's activity in recent years should produce a bumper crop of the high-flying clouds, which have been on the rise and could be linked to climate change.

Mysterious night-shining clouds may peak this year

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