Professor of Science, Harvard University / Galileo Project
Harvard University Department of Astronomy
Avi Loeb is a former chair of the Harvard astronomy department and one of the most prominent mainstream scientists to take the possibility of extraterrestrial technology seriously as a scientific hypothesis. He founded the Galileo Project to systematically search for evidence of extraterrestrial technological artefacts using observatory networks and material analysis.
Loeb became a household name in the UAP/UFO community following his 2021 book "Extraterrestrial: The First Sign of Intelligent Life Beyond Earth," in which he argued that the interstellar object 'Oumuamua — detected in 2017 — was more consistent with an artificial artefact than a natural object, based on its anomalous acceleration and flat shape.
He is careful to frame this as a scientific hypothesis rather than a claim, and he has been consistently critical of both reflexive dismissal by the mainstream scientific community and uncritical acceptance within the UAP community. His position is that science has an obligation to investigate extraordinary phenomena rather than dismiss them.
The Galileo Project, launched in 2021, deploys a network of telescope systems equipped with cameras, radio receivers, and audio detectors to monitor the sky for anomalous phenomena. In 2023, the project's ocean expedition to Papua New Guinea recovered spherules from a location consistent with the 2014 fireball trajectory of IM1 — a meteorite Loeb believes may have originated outside our solar system. Analysis of the spherules has been contested by other researchers.
'Oumuamua detected passing through solar system; Loeb proposes artificial origin hypothesis
Publishes "Extraterrestrial" — mainstream science dismisses hypothesis, public response is large
Launches Galileo Project at Harvard
Pacific Ocean expedition recovers spherules from IM1 impact site
Continues Galileo Project observations; debates IM1 findings with scientific critics
A serious and credentialed astrophysicist who applies rigorous scientific methodology. His position is controversial within mainstream astronomy but he distinguishes carefully between scientific hypothesis and claim. His Galileo Project is a legitimate scientific initiative.
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