Mathematical encoding within multi-resonant planetary systems as SETI beacons

@article{Clement2022MathematicalEW,
  title={Mathematical encoding within multi-resonant planetary systems as SETI beacons},
  author={Matthew S. Clement and Sean N. Raymond and Dimitri Veras and David M. Kipping},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2022}
}
How might an advanced alien civilization manipulate the orbits within a planetary system to create a durable signpost that communicates its existence? While it is still debated whether such a purposeful advertisement would be prudent and wise, we propose that mean-motion resonances between neighboring planets – with orbital periods that form integer ratios – could in principle be used to encode simple sequences that one would not expect to form in nature. In this Letter we build four multi… 

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The Fibonacci sequence was indeed the one transmitted by intelligent aliens in Contact
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