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Joined 2 years ago
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Cake day: July 31st, 2023

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  • Plasma is electrically charged, so it interacts with magnetic lines.
    The sun has magnetic field lines just as the earth does. It also rotates. But- since it’s not solid, it doesn’t have to rotate all at the same speed. The plasma in fast-rotating regions drags the field lines further than the plasma in slow rotating areas, creating weird loops, breaks and reconnections in the field lines. I’m almost certain that what we’re seeing in this lovely bit of photography is a cloud of plasma travelling across, or trapped by one of those rogue field lines which has been pushed upwards from the surface by differential rotation.









  • I think it’s just an assumption based on the mode of society at that time in history. If it was built in the 12th century it was built by what we would now consider slaves. In the 1100s the land was divided into fiefs and the lord of that land considered the people who lived and worked on the land as part of that land: serfs. Unless this bridge was an exception to the rule, then serfs would have undertaken all the labour that got it built.