Researchers at the SETI Institute, led by Sofia Sheikh, explored how a hypothetical twin Earth with advanced technology could detect Earth's technosignatures, such as radio signals and nitrogen dioxide emissions. Their study reveals that while no Earth-like twin may exist, understanding our own technosignatures can enhance the search for extraterrestrial life. Notably, signals from Earth, particularly those from the now-defunct Arecibo Observatory, could be detected up to 12,000 light-years away. The findings encourage a broader perspective on how alien civilizations might perceive our technological footprint.
If a twin Earth did exist, what specific technosignatures do you think would most effectively reveal our presence to them?
Source: https://gizmodo.com/if-aliens-spot-us-first-what-signs-of-intelligence-will-they-see-2000559505
If a twin Earth did exist, what specific technosignatures do you think would most effectively reveal our presence to them?
Source: https://gizmodo.com/if-aliens-spot-us-first-what-signs-of-intelligence-will-they-see-2000559505