The Galileo Project: Harvard’s Scientific Search for UAP Evidence

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When Harvard astronomer Avi Loeb suggested that the interstellar object ‘Oumuamua might be an alien artifact, most of his colleagues dismissed the idea. Rather than argue further, he built a telescope. The research program, named after the scientist who proved the Earth orbits the Sun despite institutional resistance, is the first systematic scientific program designed to look for physical evidence of extraterrestrial technology near Earth. Not radio signals. Not mathematical patterns. Actual objects.

TL;DR: The research program, called the Galileo Project, is a Harvard-based scientific initiative founded in 2021 by astrophysicist Avi Loeb. Its mission is to systematically search for evidence of extraterrestrial technological artifacts and UAP by monitoring the sky with a network of sensors and analyzing findings with machine learning. In November 2024, the project released commissioning data covering over 500,000 aerial objects tracked by its observatory. In 2023, the project conducted an ocean expedition to recover materials from a 2014 interstellar meteor, finding metallic spherules whose composition remains under study. In March 2026, Loeb stated the project is now capable of discovering UAP. Sources linked below.

Timeline

2017 The interstellar object ‘Oumuamua passes through our solar system. Its unusual shape, non-gravitational acceleration, and lack of a visible coma (the gas tail typical of comets) puzzle astronomers. Harvard astrophysicist Avi Loeb publishes papers suggesting the object could be a light sail or other artifact of extraterrestrial technology.

June 2021 The Office of the Director of National Intelligence releases a preliminary assessment on UAP, confirming that the objects are real, frequently detected, and often defy explanation. The report galvanizes public interest in UAP research.

July 2021 Loeb founds the Galileo Project for the Systematic Scientific Search for Evidence of Extraterrestrial Technological Artifacts at Harvard University. The project is named after Galileo Galilei, whose telescopic observations challenged the scientific consensus of his time. The research program positions itself as complementary to SETI, searching for physical objects rather than electromagnetic signals.

2021-2023 The team builds and deploys its first observatory near Harvard, equipped with infrared cameras, optical cameras, acoustic sensors, and a radio detector. The system continuously monitors the sky and uses machine learning algorithms to classify detected objects.

June-July 2023 Loeb leads an ocean expedition to Papua New Guinea to recover materials from a 2014 interstellar meteor designated IM1, which entered Earth’s atmosphere over the Pacific Ocean. The expedition recovers metallic spherules from the ocean floor near the meteor’s calculated impact site.

August 2023 Loeb publishes initial analysis of the recovered spherules, describing some as having compositions consistent with an extraterrestrial or unusual origin. The claim generates significant media attention and significant criticism from the scientific community.

November 2024 The project releases commissioning data from its observatory, covering over 500,000 aerial objects tracked and classified. The data represents the project’s first systematic census of aerial phenomena. No objects are confirmed to be of extraterrestrial origin, but the dataset establishes a baseline for future detections.

March 2026 Loeb publishes an essay titled “A Scientific Alternative to Government Disclosure: the project is now capable of discovering UAP,” arguing that the project’s observatory network can provide scientific evidence for UAP that government programs have failed to release publicly.

What the Project Does

The research program operates differently from government UAP programs. While AARO and its predecessors have focused on analyzing military sensor data and pilot reports, the project builds its own detection systems and applies standard scientific methodology to any anomalous findings.

Observatory network. The project’s primary instrument is a suite of observatories equipped with infrared cameras, optical cameras, acoustic sensors, and radio detectors. These sensors continuously monitor the sky and capture data on all aerial objects, not just those reported by witnesses. Machine learning algorithms classify detected objects and flag any that do not match known aircraft, birds, drones, or natural phenomena.

Ocean expeditions. In 2023, the project conducted its first ocean expedition to recover materials from IM1, a meteor that entered Earth’s atmosphere in 2014 and was confirmed to be of interstellar origin by U.S. government sensors. The expedition recovered metallic spherules from the Pacific Ocean floor. Analysis of these spherules has been published in peer-reviewed journals, though the interpretation of the results remains contested.

Data publication. The project publishes its data openly, in contrast to government UAP programs that classify most sensor data. The November 2024 commissioning dataset, covering 500,000 aerial objects, was released publicly. This transparency is a core principle of the project: scientific evidence for UAP should be available to the scientific community, not locked behind classification barriers.

Machine learning classification. The project uses AI algorithms to classify detected aerial objects in real time. The system learns from its detections, improving its ability to distinguish between conventional objects (aircraft, birds, drones, balloons) and potentially anomalous objects. This approach addresses the same problem that NORAD faced in the 2023 shootdown incidents: how to detect and classify slow-moving or unusual objects that automated systems filter out as noise.

The Interstellar Meteor Controversy

The project’s most controversial activity has been its recovery and analysis of materials from IM1, the 2014 interstellar meteor. The controversy centers on whether the recovered metallic spherules are genuinely extraterrestrial or terrestrial in origin.

What was found. The ocean expedition recovered dozens of metallic spherules from the ocean floor near IM1’s calculated impact site in the Pacific. Initial analysis by Loeb’s team found that some spherules had compositions inconsistent with known terrestrial sources, including high concentrations of beryllium, lanthanum, and uranium.

What critics say. Several scientists have challenged the methodology and conclusions. Critics note that metallic spherules are common in ocean sediments from various sources including industrial pollution, volcanic activity, and meteor ablation. The composition of the recovered material has been argued to be within the range of terrestrial sources. The timing and location of the recovery have also been questioned, with some arguing the spherules may not be from IM1 at all.

Current status. The analysis of IM1 materials continues. Peer-reviewed papers have been published describing the physical and chemical properties of the spherules. Whether the material is genuinely interstellar remains an open scientific question that requires additional analysis and independent verification.

Opposing Perspectives

The case for the project: The research addresses a real gap in UAP research. Government programs like AARO classify most of their data and have not released comprehensive sensor datasets. Pilot reports, while valuable, are anecdotal. The project provides what no government program has offered: a continuous, publicly available, scientifically rigorous census of aerial phenomena. Even if no extraterrestrial objects are found, the project generates valuable atmospheric data and advances detection technology.

The case against: Critics in the astronomy community argue that Loeb has made extraordinary claims based on insufficient evidence. The ‘Oumuamua light sail hypothesis was rejected by most astronomers who studied the object. The IM1 spherule analysis has been challenged on methodological grounds. Some scientists worry that associating rigorous UAP research with extraterrestrial speculation makes it harder for the field to gain mainstream scientific credibility. The project’s funding from private donors, rather than scientific grants, also raises questions about peer review and accountability.

The middle ground: Whether or not the project finds extraterrestrial technology, its approach of building open, scientific detection systems addresses a genuine need. The UAP field has been dominated by government secrecy, witness testimony, and blurry photographs. A systematic, transparent, scientifically grounded detection program is valuable regardless of what it finds. The project’s emphasis on data publication sets a standard that government UAP programs have failed to meet.

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