Plesetsk Cosmodrome.
allegednuclear_strategicUSSR "Setka-AN / Setka-MO" anomalous-phenomena study
Plesetsk Cosmodrome is a major northern Russian missile and space launch site. Some 'jellyfish'-shaped sky phenomena, like the 1977 Petrozavodsk event, are attributed to spiral exhaust plumes and…
Plesetsk Cosmodrome is a major northern Russian missile and space launch site. Some 'jellyfish'-shaped sky phenomena, like the 1977 Petrozavodsk event, are attributed to spiral exhaust plumes and propellant venting from launches originating there. The facility is real; the launch-link explanation for specific sightings is alleged but plausible.