Three-Horizon Framework for Technosignature Searches: Optical Beacons, Planetary Signatures, and Megastructures in Existing Astronomical Data
To the point
Non-radio technosignatures can be hunted now and in the near future by using data from current, near-future, and future observatories to look for optical beacons, planetary technologies, and megastructures, with null results tightening how common intelligent life is and a discovery potentially reshaping our understanding, while collaboration across missions is essential, as Andy Tomaswick notes.
