Overview
- Breakthrough Listen used the 100-meter Green Bank Telescope on December 18 to scan 1–12 GHz, detecting no technosignature and ruling out isotropic continuous-wave transmitters above 0.1 W at 3I/ATLAS.
- The radio analysis reduced roughly 471,000 initial candidates to nine events, all identified as interference or off-target signals.
- Hubble observations on December 12 and 27 revealed twin narrow jets with a slight wobble, pointing to organized outgassing and complex rotational behavior.
- ESO’s Very Large Telescope spectroscopy, published December 10, shows a dust-dominated red coma with CN emission and unusually strong neutral nickel lines, consistent with a cometary source.
- Europa Clipper and ESA’s JUICE recorded unique probe-vantage views near perihelion with results still to be published, as the third confirmed interstellar object travels back out of the inner solar system.