SETI Searches for Alien Signals in TRAPPIST-1 System

Researchers used radio telescopes to scan for extraterrestrial communications between the exoplanets of the TRAPPIST-1 system.

The TRAPPIST-1 system, located 40 light-years from Earth, comprises seven Earth-sized exoplanets, some in the habitable zone.
SETI and Penn State conducted the longest single-target search for radio signals from these exoplanets, logging 28 hours using the Allen Telescope Array.
The study focused on detecting narrowband signals that could indicate alien technology, particularly during planet-planet occultations.
Despite analyzing millions of signals, researchers concluded that none were of non-human origin, with most interference coming from Earth-based sources.
Future searches will benefit from improved technology like the upcoming Square Kilometer Array, potentially enhancing the ability to detect faint extraterrestrial signals.