Unknown Jellyfish Looking Object Enters Atmosphere

Occurred on July 1, 2021 / Amur Oblast, Russia

: My friends and I saw the movement of some object in the sky, it looked like a comet, but it flew slowly and we realized that it was some kind of rocket or flying machine, a little later it exploded and a pattern in the form of jellyfish was formed, we even heard some kind of sound similar on blast.