A Quest for City Lights Beyond Planet Earth

Scientists are searching for artificial light sources on other planets.

via Scientific American

The search for city lights on habitable planets may sound speculative, but it is worth pursuing as a potential technosignature with planned instruments. Proxima b orbits its star every 11.2 days, providing 32.6 more opportunities for its possible inhabitants to celebrate their birthdays than we have on Earth, once per 365.2 days. The high demand for bright lights during birthday parties on the nightside of Proxima b would be a reason for us to celebrate as well, if the signal was noticed by future telescopes.

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