In the sky over the Novosibirsk began the season of noctilucent clouds, typical for the summer.
Noctilucent clouds seen in the summer, because at this time practically no night — her place is astronomical twilight. The sun never sets beyond the horizon and illuminates the clouds, so they can be clearly seen.
Astrophotographer Dennis Franczak could make their images June 7 — look how beautiful the sky was that night.