All articles tagged with #extraterrestrial civilizations
Originally Published 2 months ago — by Universe Today
Recent research suggests that advanced civilizations could reside near the galactic core, utilizing black holes for time dilation to expand their lifespan and exploration capabilities, which may explain why we haven't detected them and offers new avenues for SETI efforts.
Originally Published 3 months ago — by Universe Today
Scientists suggest that galaxies with high radio emissions could harbor advanced civilizations, but such galaxy-spanning ETIs are extremely rare, with less than 1 in 100,000 large galaxies potentially hosting them. The research uses models to set upper limits on the prevalence of these civilizations based on radio observations, and proposes expanding searches to other frequencies and technosignatures beyond radio waves.
Originally Published 5 months ago — by Phys.org
The article explores the potential lifespan of a Dyson megaswarm, a hypothetical megastructure built around a star for energy capture, concluding that without maintenance, such structures would typically be destroyed within a few million years due to gravitational and environmental forces, with their longevity depending on the star's size and the structure's design.
Originally Published 2 years ago — by BBC.com
Scientists are exploring the possibility of detecting alien life not through radio signals, but through the detection of pollution in the atmospheres of distant planets. Researchers have proposed the idea of "technosignatures," which are signs of a technologically advanced civilization, such as the presence of chlorofluorocarbons (CFCs) or nitrogen dioxide (NO2) in the atmosphere. Telescopes like the James Webb Space Telescope and upcoming observatories will have the capability to detect these pollutants and potentially reveal the presence of alien civilizations. However, there is also the possibility that truly intelligent civilizations may not produce long-lasting pollutant-based technosignatures, making the search for alien life more challenging.