4 ms·

It could be the result of the closing of the dyson sphere/swarm. If the dyson sphere/swarm is built like giant Venetian blinds, it could work.

• Someone 6y ago
  Easier: if they build the frame for the sphere first, then added (gigantic) panels one at a time, a part filled with panels might have moved into our line of sight.
  • JoeAltmaier 6y ago
    Or maybe they built them all in a higher orbit spaced apart, then simultaneously decelerated them all so they fell as one into a Dyson sphere! Have to have some kind of process, why not that one?
    • menybuvico 6y ago
      Self-propelled modular elements that are built separately, and then placed and connected to others.