Nasa reveals why we haven't detected any advanced alien civilisation so far

Nasa reveals why we haven't detected any advanced alien civilisation so far

Nasa reveals why we haven't detected any advanced alien civilisation

One of astronomers key priorities is understanding the potential for life elsewhere in the universe. Despite extensive exploration, space agencies like Nasa has not found any credible evidence of extraterrestrial life.

However, the search continues as scientists aim to answer fundamental questions, including whether we are alone in the universe. Nasa has detected over 5,500 worlds outside the Solar System as it search widens.

A recent paper published in the Astrophysical Journal offers a compelling hypothesis for why advanced extraterrestrial civiliaations might be hard to detect.

According to the study, if such civilisations exist, their energy requirements might be relatively modest. This means they wouldn't need to build enormous stellar-energy harvesting structures that could be detected by our telescopes.

These structures, based on our own technological trajectory, might include vast solar panel arrays or orbiting megastructures designed to harness most of their parent star's energy.

Ravi Kopparapu of Nasa’s Goddard Space Flight Center, the lead author of the paper, explained, “We found that even if our current population of about 8 billion stabilises at 30 billion with a high standard of living, and we only use solar energy for power, we still use way less energy than that provided by all the sunlight illuminating our planet.”

This study has significant implications for the Fermi paradox, which questions why, given the age and vastness of our galaxy, we haven't encountered any alien civilisations.

Source: India Today