Noctilucent clouds shining low on the northern horizon just after sunset. The exposure was 20 seconds to capture the clouds but a quick fire of the flash illuminates the field in the foreground.
Another noctilucent cloud display. These clouds form at the very edge of our atmosphere, on the border of space.
Ursa Major appears high in the sky over a faint display of noctilucent clouds. Taken from Norfolk, UK.
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