Monday, 2. July 2007
Topic: NATURE - on July 2, 2007 at 5:24:00 PM CEST
Mysterious "Night-Shining Clouds" Sighted
Still shrouded in mystery, these "night-shining clouds" were photographed illuminating the sky over Budapest, Hungary, on June 15.
They are among the first such noctilucent clouds pictured this year.
The clouds form in the upper layer of the Earth's atmosphere in summer.
Scientists don't know much about how the clouds form, or why they have been appearing more often at lower latitudes and glowing brighter.
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