Avi Loeb is a Harvard astrophysicist and co-founder (with frank-laukien, July 2021) of the galileo-project, a scientific initiative searching for extraterrestrial technological artifacts. Loeb directed Harvard’s Institute for Theory and Computation for 20 years.
On UAP disclosure (2026)
Loeb’s earliest captured reaction to Trump’s Feb 19, 2026 directive is on NewsNation’s Jesse Weber Live (Feb 20, 2026; src-newsnation-elizondo-pandoras-box-2026-02): released files could yield “higher-quality images than the public is used to seeing,” and “there could be some materials that were retrieved and are puzzling — the best way to figure things out [is] to share it, if we are sure it’s not coming from adversarial nations.” This is the earliest Loeb-on-Trump-disclosure quote in this vault, predating his April 16 Medium essay (src-loeb-wh-uap-videos-skeptic-2026-04) by two months.
Per src-trump-uap-files-delay-2026-03, Loeb argues the real “gold mine” of any U.S. government UAP release would be high-resolution satellite imagery of UAP events — capable of identifying unfamiliar objects and measuring their speed — plus any material recovery details from alleged crash sites. Newsweek’s coverage of donald-trump’s April 17 TPUSA remarks (src-trump-tpusa-ufo-tease-2026-04) carries Loeb’s same prescription: high-resolution satellite imagery and recovered physical materials testable for non-solar-system isotopic signatures.
In an April 16 Medium essay (src-loeb-wh-uap-videos-skeptic-2026-04) Loeb sharpens the skeptical case against the Pentagon/White House release:
- The most scientifically interesting UAP data is likely from recent classified state-of-the-art sensors and probably will not be released for national-security reasons.
- Released material should be raw, undegraded, un-post-processed so independent scientists can analyze it.
- Satellite imagery is the most analytically valuable form because it removes camera-motion ambiguities.
- Even one gram of alleged UAP-crash material is sufficient for mass-spectrometer isotope analysis to test extrasolar origin (solar-system materials share an isotopic signature; extrasolar materials would deviate). See crash-retrieval-programs.
- Decades-old UAP information likely poses minimal national-security risk.
He illustrates the verify-don’t-dismiss methodology with a Galileo Project case in which a postdoc’s triangulation analysis of an apparent zig-zag object 5.6 km away was traced to a software-malfunction artifact during periods of missing camera data.
Galileo Project capability milestone (March 2026)
In src-galileo-project-uap-capability-2026-03, Loeb announces a major instrumentation milestone: Galileo can now measure distances to airborne objects to better than 10% via 10-km-baseline multi-station observation, enabling true 3D velocity and acceleration (see uap-triangulation). He frames this as a scientific alternative to government uap-disclosure — civilian instruments can independently verify whether an object lies outside human-tech performance envelopes regardless of file release. Loeb identifies the unknown camera-to-object distance as the “Achilles Heel” of past congressional UAP videos and offers to sit on a review board for any classified UAP satellite data.
Panspermia and directed panspermia (March 2026)
In a March 19 2026 Medium essay (src-loeb-panspermia-impact-survival-2026-03), Loeb argues that newly published ~2 GPa microbe-pressure-survival data, combined with deinococcus-radiodurans’s tolerance for interplanetary transit, materially strengthens the natural panspermia case. He extends the argument to directed-panspermia — proposing humans attach a microbe-nutrient-power capsule to an interstellar object like 3i-atlas to deliberately seed exoplanet habitable zones. Loeb invokes Mars meteorite alh84001, the seven-planet trappist-1 system, the ryugu DNA-base detection (via spherex organics on 3I/ATLAS for the interstellar-object angle), and the “we are all Martians” luca hypothesis ~4.2 Gya.
He also raises a speculative “Trojan Horse” framing — that some interstellar objects could appear as natural comets while carrying technological payloads — continuous with his earlier galileo-project line of argument.