In Moscow started the season observing noctilucent clouds
Night clouds can be seen about an hour after sunset, said the head of the hydrometeorological center of the Russian Federation.
MOSCOW, 5 July. /TASS/. Unusual noctilucent clouds can be seen in the night sky over Moscow. This was announced on Wednesday, the TASS Director of the hydrometeorological center of Russia Roman Vilfand.
Noctilucent clouds — a relatively rare atmospheric phenomenon pic.twitter.com/0ltbqtIruI
— Space & Astronomy (@astrogid) on 30 June 2017.
He noted that it is a beautiful phenomenon that decorate the sky during the summer. These clouds could be observed in the night of July 4 and 5 at the clear sky.
These clouds are visible at night, they are often called night sky. They are silver and beautiful glow at night when the sun sets, his rays penetrate deep into the atmosphere, permeating it with light.Roman Villanderer meteorologist of the Russian Federation
According to him, the silver cloud is a cluster of water vapor molecules. “These clouds are very high, at a distance of about 100 km from the Earth’s surface. To predict their occurrence is impossible, since their nature is not clear. They appear in summer and the nature of these clouds is not fully known,” — said Vilfand.
Noctilucent clouds over Moscow ( 23.06.2017, author photo Sergey Wooden )…#ПогодаиКлиматhttps://t.co/GLeJnqFwic pic.twitter.com/Ofp9g16fzu
— XissUFOtoday Space (@xufospace) 23 Jun 2017
According to experts, a silver cloud you can enjoy about an hour after sunset. An hour before sunrise they again disappear. They first appear in the North-West, and then, after the middle of the night, they are more visible in the North-East. In the Moscow latitudes they are best seen in early July.