Avi Loeb finds 7 possible interstellar meteors in NASA fireball data
The Voyager 1 spacecraft will depart the outer boundary of the Oort cloud at a distance 100,000 times the Earth-Sun separation in approximately 30,000 years. Roughly 10,000 years after that milestone, the probe will pass within 1.6 light-years of the red dwarf star Gliese 445, situated 17.6 light-years from Earth. Billions of years into the future, the probe could collide with a terrestrial exoplanet along its trajectory and enter the sky as an interstellar meteor. An astrophysicist on that world might inspect the physical anomaly, launch a retrieval expedition to the impact site, and discover physical proof of distant intelligence.
Stephon Alexander, a professor of physics at Brown University, recounted an encounter at a scientific conference in Iceland two decades ago where support from an established Harvard University researcher broke his initial sense of isolation. “That was you!”, Alexander stated when recalling the meeting.
United States government satellites observe thermal radiation across the planet to track ballistic missile launches and occasionally log fireball detonations. NASA and the Jet Propulsion Laboratory store these atmospheric entries in the database maintained by the Center for Near Earth Object Studies. Volkan Duran joined Avi Loeb to examine whether recorded objects in this archive surpass the velocity required to escape the Solar System.
The public fireball catalogue tracks bright atmospheric impacts without listing velocity uncertainties. The calibration of CNEOS data against nineteen ground-based reference trajectories showed that speed measurements had an average residual error of minus one kilometer per second for nine high-quality events, while seven entries out of 354 total atmospheric records matched speeds exceeding the escape threshold of the Solar System. Seven entries show interstellar speeds. Richard Cloete and Avi Loeb identified the Polar-IM event from April 1, 2026, as the most prominent post-2018 anomaly in the database. Independent ground instruments indicate that this trajectory may still reflect a marginally bound solar orbit.
The confirmed detections of 1I/ʻOumuamua, 2I/Borisov, and 3I/ATLAS verify that macroscopic bodies from other star systems cross the inner Solar System. Earth’s atmosphere acts as a wide collection surface for meter-scale meteoroids, yet hyperbolic classifications remain vulnerable to instrumental margins of error. Objects qualify as interstellar when velocity relative to the Sun exceeds escape speed, though measured differences often match the uncertainty scale of satellite sensors.
The paper applies a structured hierarchy of evidence to calibrate database uncertainties, concluding that existing public entries alone do not provide definitive proof of an interstellar meteor. Resolving the nature of the Polar-IM impact requires a three-dimensional stereo reconstruction that incorporates observational error margins.
The release of velocity, coordinate, and energy records from classified missile sensors demonstrates a working protocol for publishing scientific data. Avi Loeb leads the UAP Science Advisory Council and advocates for similar transparency regarding Unidentified Anomalous Phenomena. Public dissemination of sensor measurements can occur without exposing sensitive national security hardware. Scientific investigations have not yet confirmed whether any documented meteor or atmospheric phenomenon represents an artificial interstellar probe.
The Mount Lemmon Observatory, operating under the Catalina Sky Survey, identified asteroid CERNQ52 hours before atmospheric entry. The rocky body, measuring between 0.8 and 1 meter across, disintegrated over the Indian Ocean northwest of Australia between 16:00 and 16:30 UTC. The event represents the 13th successful advance detection and trajectory prediction of an incoming asteroid prior to atmospheric impact.
Avi Loeb directs the Galileo Project and the Black Hole Initiative at Harvard University, having previously led its astronomy department between 2011 and 2020 before publishing the book Interstellar in August 2024.
