The so-called "Bugby Moons" ("Bigby Moons" or "Badgby Moons", depending on how the astronomer's surname was translated) are hypothetical space objects of artificial origin, possibly fragments of one large body that exploded in near-earth orbit.
In the mid-1970s, the American astronomer John Bagby (JP) discovered 10 Earth satellites, the trajectories of which had very interesting features - they converged at one point. They seemed to be parts, fragments of one body, which for some reason exploded. According to his estimates, their diameter ranged from 7 to 30 m.
During the explosion, its debris, of course, flew in different directions, some of them entered the atmosphere, burned up or fell on the planet, some remained in space - each rotates in its own orbit.
Trajectory specialists are able to calculate the location of the point in space at which the separation occurred and from which these "Ten Bugby Moons" (as they were called) flew. The date of the explosion can also be calculated, Bugby suggested that it happened on December 18, 1955. It was then that astronomers noticed a strange large flare in orbit.
There was a lot of controversy among astronomers about what exploded in space, but everyone agreed that something exploded, made, of course, not on Earth (initially, the body that had not yet exploded was rotating in an orbit that at that moment did not yet exist on Earth. satellites, or rather - the first ones have just appeared). What? Alien spaceship or probe?
Soviet science fiction researcher A. P. Kazantsev put forward his version that the Bagby fragments are an orbital ship from which a probe was sent, which crashed in 1908 (and became the so-called Tunguska meteorite).
And the orbital mother ship itself automatically remained in orbit, waiting for the dead crew. Not wait. In 1955, fuel supplies apparently ran out and due to friction in the atmosphere, the giant ship began to decline. Falling to the surface of our planet could bring death to thousands of people and at the same time give the earthly civilization access to dangerous technologies … And on December 18, 1955, the machines give the order to self-destruct. The ship explodes.
Perhaps, Kazantsev later assumed, a piece of engineering structure 1.2 meters long found on the Vashka River in 1976 (the so-called "Vashskaya Find") is a fragment of "Moon Bagby".
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This piece was divided into three parts, and when three independent research institutes of the USSR Academy of Sciences made their analysis, it turned out that they all consist of the rarest (for the Earth) chemical elements, "which are difficult to obtain even under modern technology."
It was hypothesized that Vash's find was a fragment of some apparatus that exploded in Earth's orbit no earlier than 1955. Subsequently, however, it turned out that the Vashkskaya find was a part of a Soviet rocket. True, it remained unclear why the technologists who made the analysis did not know the latest rocket technologies …