> Radio antennas or telescopes could work too Antennas are vulnerable to noise, anyone with enough effective radiated power placed near enough to it can nudge

> Radio antennas or telescopes could work too Antennas are vulnerable to noise, anyone with enough effective radiated power placed near enough to it can nudge it one direction or another. > except for maybe the surface of the sun Perhaps, but overall the Sun follows 22-year cycles. [1] [1]: https://en.wikipedia.org/wiki/Solar_cycle https://en.wikipedia.org/wiki/Solar_cycle