Re: No return
My understanding of Starwisp is that, being driven by masers, they would sent a slug of maser (radio) energy to meet it at the target star. That would be used to power up the circuitry to make observations, and also to power the return signal.
Starwisp is not a single postage stamp-sized chip, it's a mesh of wires with electronic nodes at the intersections. So it has a wide area for making optical observations, and for shaping the return beam.
Biting the hand that feeds IT
