Transients in the Palomar Observatory Sky Survey

[JMartJr]

It's similar to the "why do alien spaceships have flashing lights all over them?" question that always leads to some "who can know the motivations of beings beyond our ken" type answer.

Best answer I ever heard for this was along the lines of "Maybe the lights we're seeing are in a wavelength THEY can;t see, they don;t even know how eye catching they are!" I don't buy it (they've abducted and tested enough people by now to know what wavelengths WE can see!) but it gets points for creative thinking, I guess...