Official record
The sphere moved rapidly, leaving a narrow trail of light.
A professor near Sassari described a blue-green sphere that rapidly crossed the sky, vanished, and then reappeared.
What we know
Professor Giovanni Battista Sias reported the sphere.
The event occurred near Sassari, Italy, in 1952.
What we know
The sphere moved from east to west, vanished, and then reappeared.
Sias described a narrow trail of light behind the sphere.
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