Transmitting from other starts would take enormous amounts of energy to be detected here on Earth, yes?
Let's say we eventually are able to make a probe that could remain viable until reaching another star. What good would that do us if we could not get information back from the probe?
How would we send signals back to Earth without energy sucking powerful transmitters? How about using the star itself as part of the transmitter?
For my hypothetical, let's assume that the last step of getting to said star is to maneuver itself in to orbit around that star.
Then the probe deploys an x-ray / gamma ray lens and shutter system, whereby the lens ensures a focused beam of x-rays / gamma rays are pointed towards Earth during optimal orbital positioning, and the shutter modulates the x-rays / gamma rays to carry intelligence. High speed Morse-code, if you will, where the shutter is the tapping mechanism, and the x-rays / gamma rays are the copper lines.
Something similar could be set up around the Sun for communicating back to the probe, if needed.
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