Aliens might be transmitting communications signals to each other across exoplanets, some astronomers think. Since these signals are likely sent as narrowband radio waves, we may now have a way to ...
Scientists suggest the first alien signal we detect could be a desperate cry for help from a fading civilization.
Scientists have sought out and detected radio emissions from from interstellar comet 3I/ATLAS, all but confirming that it has natural origins.
SETI Institute Tracks ‘Twinkling’ Pulsar Signals to Sharpen Cosmic Clocks and Hunt for Alien Signals
SETI scientists observing a pulsar’s radio pulses over time are redefining how astronomers time pulsars and search for ...
On Dec. 19, 2025, 3I/ATLAS flew by Earth and did more than just give astronomers something to look at; it brought a piece of ...
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Why the most famous alien signal went silent
In 1977, astronomers detected a powerful, narrowband radio signal that appeared to come from deep space. It lasted just 72 ...
Scientists searched 27 exoplanets for alien technology using planetary eclipses, revealing a new way SETI hunts signals ...
SETI's 1977 "Wow!" signal from deep space was even stronger than originally thought, but its source remains a complete ...
On August 15, 1977, the Big Ear Radio Telescope in Delaware, Ohio, received the most powerful signal it would ever detect during its decades of observations. The signal lasted just 72 seconds, but ...
A new SETI methodology focuses on detecting the "spillover" from directed interstellar communications, mirroring how we communicate with our own spacecraft, rather than relying on broad, speculative ...
Astronomers have been scanning the skies for alien radio signals for decades, but so far they’ve heard nary a peep (with one possible exception). But according to a recent study, that could be because ...
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