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cross-posted from: https://lemmy.world/post/33205229

It was 27 October 1954, a typically crisp autumn day in Tuscany. The mighty Fiorentina club was playing against its local rival Pistoiese.

Ten-thousand fans were watching in the concrete bowl of the Stadio Artemi Franchi. But just after half-time the stadium fell eerily silent - then a roar went up from the crowd. The spectators were no longer watching the match, but were looking up at the sky, fingers pointing. The players stopped playing, the ball rolled to a stand-still.

Play was suspended because spectators saw something in the sky, according to the referee's match report.

The incident at the stadium cannot simply be interpreted as mass hysteria - there were numerous UFO sightings in many towns across Tuscany that day and over the days that followed. According to some eyewitness accounts a ray of white light was seen in the sky coming from Prato, north of Florence.

It is a fact that at the same time the UFOs were seen over Florence there was a strange, sticky substance falling from above. In English we call this 'angel hair'.

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[-] Delta_V@lemmy.world 3 points 2 months ago

Could have been an experimental pulsejet fueled by silane + diborane. One of the exhaust products would be beads of molten glass, which would get stretched into threads by the wind as they exit the rocket nozzle at high speed.

A lot of research went into it in the 1950s.

https://en.wikipedia.org/wiki/Zip_fuel

More recently, NASA experimented with using silane + hydrogen gas to light the X-43's scramjet engines.

The problem with using silicon based fuels is that it puts sand in the exhaust and that tends to destroy engines. Its very efficient and powerful while it works though, and it makes a rocket easy to start/re-start because it spontaneously combusts when exposed to air.

this post was submitted on 20 Jul 2025
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Forteana

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