I received a phone call from my mother about the fact that she sees several flying points in the sky. when i looked at the sky, i saw that a group of about 10-15 objects like a satellite flying in the night sky was moving along the starry sky. a group of objects walked along the sky crossing the constellation cygnus between the stars deneb and sandra. next, she relayed the constellation of the northern crown.   it attracted attention that the group of objects moved rectilinearly rather quickly, the objects inside the group changed their location relative to each other. they then stretched in a line, then gathered in a swarm. without changing directions, the objects moved in a straight line and disappeared from sight, losing their brightness.   the objects were white-blue, had not very high brightness (less than the brightness of the main stars of the constellations) and there was a feeling that they were moving in some kind of gas cloud.