Noctilucent clouds during July 2001 at about 4 hours after sunset in Finland, where twilight lingers in the summertime. Similar clouds were produced by a 1997 shuttle launch.
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Noctilucent clouds during July 2001 at about 4 hours after sunset in Finland, where twilight lingers in the summertime. Similar clouds were produced by a 1997 shuttle launch. |
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