A US space expert, Brian Weeden, tracked the Luch satellite and said it moved to a position in June where there were no other Russian satellites, but which put it “right in between two operational Intelsat satellites… where it remained until mid-September”.

Enter Jason Wright, the Penn State University astronomer suggesting the irregular reading might be a product of orbital megastructures, essentially massive alien satellites. Megastructures, Wright says, would be “very large” — and likely made of very thin materials to offset the constraints imposed by launching and controlling big objects. Wright suggestion was, in a sense, Occam’s Razor reasoning: Astronomical explanations couldn’t account for brightness dropping by a staggering 22 percent. To give a sense of just how extreme that number is, a planet the size of Jupiter would block about 1 percent of light — and planets don’t get much bigger than that.