> There are a lot of radars tracking objects in low earth orbit. If there were objects the Nimitz radar could see in orbit "for centuries or more" we'd have see

> There are a lot of radars tracking objects in low earth orbit. If there were objects the Nimitz radar could see in orbit "for centuries or more" we'd have seen them a very long time ago. I'm struggling to make sense of your argument here. People have reported seeing them for a very long time. The core elements of the "ufo phenomenon" appear to be pretty well-conserved across space and time. >Radars are probabilistic systems, and with military radars these days the processing is quite complex and sophisticated. There's a going on to reject clutter. This sometimes goes haywire for perfectly banal natural reasons. you are ignoring the fact that the pilots saw these objects with their eyes. Unless the radar systems on multiple planes and the eye-brain systems of multiple humans all failed exactly at the same time and in the same way?