What is less clear is why an alien civilisation would build such a thing in the first place. But the researchers speculate that the energy being sent out is driving interstellar light sails, where spacecraft ride along on light waves in the same way a boat moves through the ocean. Whatever is generating the FRBs is powerful enough to push around something weighing a million tons, or about 20 times the biggest cruise ships ever built.
“That’s big enough to carry living passengers across interstellar or even intergalactic distances,” said Lingam.
Perhaps the beam would be able to accelerate the ship to near light speeds which would mean the signal planet is probably not too far away. I wonder if our radio waves would reach their planet in the near future?