In a surprising twist to our understanding of comets, mysterious radio signals have been detected emanating from comet 67P/Churyumov–Gerasimenko. These signals, recorded at frequencies between 40 and ...

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December 10, 2025, Mountain View, CA -- For 10 months, a SETI Institute–led team watched pulsar PSR J0332+5434 (also called B0329+54) to study how its radio signal "twinkles" as it passes through gas ...

The silence of our solar system has been broken by a celestial intruder, and space agencies are scrambling to understand the source. Following the July discovery of comet 3I/ATLAS, the global ...

Ever since astronomers first detected interstellar comet 3I/ATLAS in July, speculation about its true nature has run wild. Some experts speculate it isn’t a comet at all but rather an extraterrestrial ...

The sun has certainly woken up! It has fired off not one but two powerful X2.5 solar flares within just 7 hours.

Solar winds and coronal mass ejections may scatter narrow signals, making them harder for Earth-based telescopes to detect. The SETI Institute uses radio telescopes to search for signs of intelligent ...