The research suggests that certain types of highly developed extraterrestrial entities, located at a considerable distance, could potentially identify buildings—but only those from around 3,000 years ago, owing to the time it takes for light to traverse the vastness of the universe.
The peer-reviewed paper, titled “Are we visible to advanced alien civilizations?,” is featured in Acta Astronautica Journal Overview.
Z.N. Osmanov, the author and a Research Affiliate at the Search for Extraterrestrial Intelligence (SETI) institute, posits that by leveraging the universality of the laws of physics, the maximum distance for potential detection is approximately 3,000 light-years.
This implies that extraterrestrial observers might utilize extensive telescopes to discern the architectural marvels of major civilizations from the past, including the Romans, Greeks, and Egyptians.
In addressing the question of our visibility, the study categorizes the technological advancement level of an alien civilization, with a focus on those capable of fully harnessing the energy of their local star.
It
is hypothesized that there might be three major technological
civilizations: Type-I is an alien society that consumes the total energy
incident on a planet from their host star; Type-II is an
extraterrestrial civilization utilizing the total energy of the star;
and Type-III is an advanced alien society, that consumes the total
galactic energy....<<<Read More>>>...