A distinctive luminous, hazy cloud observed in the evening sky over southern Russian regions has been identified as a consequence of a rocket launch from California. This explanation comes from astronomer Stas Korotkiy, scientific director of the Ka-Dar Observatory.
“Most likely, we witnessed the operation of the Falcon 9 rocket`s second stage,” Korotkiy explained.
Residents across southern Russia, including Crimea, Krasnodar Krai, and Zaporizhzhia Oblast, actively shared images on social media of the glowing, jellyfish-shaped cloud. This celestial phenomenon was observed traversing Eastern Europe from south to north at 10:24 PM Moscow time. Interestingly, just an hour prior, at 9:13 PM Moscow time, a Falcon 9 rocket carrying ten satellites had launched from Vandenberg Space Force Base, en route to a sun-synchronous orbit.
The astronomer further clarified that the cloud`s appearance was a result of incandescent gases ejected by the rocket, which were then illuminated by the Sun. At the time of observation, the Sun had already set below the horizon for those on the ground.
He also noted that satellites deployed into this particular type of orbit are primarily designed for the purpose of studying Earth`s magnetic field.
Rupert Blackwood 
Clement Ashworth