Astronomer Avi Loeb participated in a question and answer session with a group of students in a classroom at Suécia on April 13, 2026. Professor Henrik Nordvall mediated the meeting. Loeb, who leads Projeto Galileu at Universidade Harvard, answered several questions about research methods, interstellar objects and the search for possible technological signatures. Ele highlighted the need to investigate anomalous behaviors based on concrete data, without initial assumptions.
Loeb mentioned his childhood on a farm and continued interest in nature and the cosmic environment. Ele stated that his work prioritizes understanding the universe in an open way, without assuming that humanity occupies a central position in the chain of cosmic events. The conversation covered practical challenges in science, specific cases of objects such as Oumuamua and 3I/ATLAS, expeditions to recover materials and criticism of the traditional approach in some fields of astronomy.
Scientific approach to anomalies
Loeb explained that the central challenge in research on unidentified phenomena is observing behaviors that deviate from what is expected. Muitos Scientists, according to him, prioritize reputation and avoid risks by labeling anomalies within known categories. Ele cited the example of Oumuamua, which showed non-gravitational acceleration without emission of gases or dust, but was initially classified as a dark comet.
This trend extends to cosmology, where about 95% of the contents of the universe are labeled as dark matter and dark energy. Loeb argued that these names may reflect limitations in current equations, possibly in Einstein’s theory of gravity, rather than confirming the existence of real invisible components. Projeto Galileu’s philosophy is to maintain intellectual honesty when collecting more data on any observed anomalies.
He reinforced that naming something unknown does not solve the problem. If an object does not behave as expected, the response should be to gather additional evidence rather than force comfortable explanations. Essa posture guides all project activities, which seeks to advance knowledge through direct observations.
Evidence that would indicate technological signature
Loeb detailed criteria for classifying an object as possible technology. Imagens in high resolution or physical samples would make it possible to differentiate a natural rock from a spacecraft. Qualquer person could make that distinction with enough data. Outras clues include artificial lights not explained by solar reflection, extreme accelerations, or materials such as stainless steel in unexpected contexts.
He recalled the 2020 SO object, identified as a NASA rocket stage thanks to the stainless steel spectrum. Caso The origin was unknown, the classification could have been different. Loeb insisted that only hard data resolves ambiguities. Sem They, hypotheses remain speculative.
In the context of interstellar objects, technological probes could focus on regions such as the habitable zone for practical reasons, similar to the behavior of bees around flowers. Isso would explain a possible greater concentration of such objects near features of interest.
Analysis of specific interstellar objects
Loeb commented on Oumuamua and 3I/ATLAS. Ambos exhibited anomalies, but none of them were conclusive as to their technological origin. In July 2025, after the discovery of 3I/ATLAS, he created the Escala of Classificação Loeb, which ranges from 0 for natural objects to 10 for technology with potential threat. Atribuiu rating 4 for both objects.
In the case of Oumuamua, the extreme shape, with brightness variation by a factor of 10 due to rotation every eight hours, and the non-gravitational acceleration without a cometary tail attracted attention. The suggestion that sunlight could propel it would require an extremely thin, flat structure, something unusual in nature.
For 3I/ATLAS, the anomalies were different and numerous. The object is much larger than Oumuamua, with an estimated mass of a thousand times that or more. Sua trajectory passed less than 5 degrees from the plane of the planets, with a random probability of 1 in 500. Apresentou antitail, abundance of deuterium a thousand times above the cosmic average, organic markers such as methane, system of three equidistant jets at 120 degrees and composition with nickel and little iron, contrary to the usual pattern in astrophysical objects.
Loeb listed 22 anomalies in a recent 3I/ATLAS essay. Apesar Furthermore, he maintains that the observations do not allow for a definitive conclusion. Mais Data is required.
Expanding search for extraterrestrial life
Loeb argued for openness beyond traditional biosignatures or technosignatures. The SETI community has focused for 65 years on radio signals, a method it considers primitive for advanced civilizations. Projeto Galileu explores alternatives such as monitoring artificial lights on the night side of exoplanets or detecting industrial pollution in atmospheres.
He cited his own article from a decade ago that quantified pollution as a technological signature. Moléculas industrially produced, different from those created by natural processes, could indicate intelligent activity. Outra line involves searching for megastructures in habitable regions of stars.
Loeb criticized the massive investment in observatories for molecular biosignatures, which geological processes also generate. Assinaturas Technological technologies could reveal intelligence more directly. Ele mentioned that almost no federal funding goes to the search for technology, which he considers to be unbalanced.
Necessary tools and advancements
Advances depend on the signature sought. Para interstellar objects, survey telescopes like Observatório Rubin in Chile and the planned Argus in the Northern Hemisphere are essential to covering the entire sky and discovering dozens of new objects in the next decade.
For high-resolution imaging, Loeb proposed optical interferometer at Lua at least 100 meters in diameter. Isso Would allow you to photograph distant objects without close flyby. Missões interceptors would also be useful for collecting detailed data or mitigating risks if an object approaches Terra.
Another proposal involves studying materials from interstellar objects that reach the solar system. Essa approach differs from the traditional one in astrobiology, which focuses on exoplanet atmospheres. Fragmentos from other stars could hold clues about the ingredients for life in distant planetary disks.
Loeb leads expeditions to recover such materials. Ele mentioned identification of another candidate interstellar meteor from 2022, with a plan for an expedition to the coast of Peru that would require around six million dollars in funding.
Shipping details to Oceano Pacífico
In June 2023, Loeb commanded expedition to Pacífico to recover remains of the interstellar meteor IM1, which exploded in 2014. The team collected hundreds of molten spheres from the ocean floor. Análises initial data revealed that around 10% of the droplets had a chemical composition different from that of the solar system, with increases of up to a thousand times in elements such as beryllium, lanthanum and uranium.
Later isotope studies reinforced the differences. The fragments recovered were small, less than a millimeter, which makes it impossible to determine whether the original object was a rock or something more complex. A Netflix documentary about the expedition is scheduled for release. Loeb classified part of the spheres as BeLaU, with an elementary pattern with no known equivalent in materials from the solar system.
Financing, independence and relations with institutions
Projeto Galileu receives funding from foundations and private donors, including a recent grant from Fundação Templeton. An observatory was installed on top of Sphere in Las Vegas. Não there is funding from federal agencies at this time, which preserves independence in setting priorities.
Loeb expressed willingness to collaborate with Pentágono and intelligence agencies, providing data on objects of human origin in exchange for access to anomalous information. Ele commented on the deadline for releasing videos of unidentified anomalous phenomena, requested by congresswoman Anna Paulina Luna.
Regarding national security, he considers objects manufactured by Earth nations uninteresting for his research. The focus remains on phenomena that cannot be explained by known technology.
Limitations of testimonials and need for concrete data
Loeb emphasized that science depends on evidence collected by instruments, not just human reports. Ele cited cases in the judicial system where candid testimony was contradicted by DNA testing. Ilusões Perceptions and personal agendas can distort reports.
Testimony at UAP hearings is intriguing but insufficient without instrumental data or laboratory-analyzable materials. A single clear piece of evidence would be enough to advance the discussion. Loeb requested access to government data, including videos or fragments of crash sites.
Possible reactions to a discovery and disclosure
Regarding the impact of a confirmed discovery, Loeb advocated open sharing with humanity. Sigilo gradual could be motivated by concerns about markets or social unrest, but he compared the situation to hiding a tennis ball in the backyard: it doesn’t make sense if the phenomenon affects everyone.
Governments base authority on the ability to protect citizens. Tecnologia Unknown advanced could challenge this perception. Loeb argued that knowing reality allows adaptation, similar to what occurs with disruptions such as artificial intelligence. Esconder facts harm career planning and social responses.
He mentioned that even scientists and businesspeople sometimes resort to magical thinking, citing the case of Steve Jobs and the delay in medical treatment.
Criticism from the scientific community and defense of curiosity
Loeb compared cosmologists to chess players, open to testable ideas, and near-object astronomers to fighters more resistant to novelty. Ele Prefers to avoid personal confrontations and focus on positive work.
He criticized misinformation on social media, including fake AI-generated videos featuring his image and voice. Criou Own YouTube channel to combat this. Atacantes often lack recent scientific credentials.
Loeb advised students to remain childishly curious and ignore anyone who pretends to have all the answers. Avanços occur when questioning the conventional with new data. Ele plans to continue the work and hopes to present interesting evidence within a year.
- Projeto Galileu operates multiple observatories to measure distances, speeds and accelerations of objects in the sky.
- Analysis of the spheres of Pacífico showed a composition with elements in abundances atypical of the solar system.
- Escala of Classificação Loeb rates interstellar objects from 0 to 10 based on anomalies.
- Future expeditions will look for materials from other interstellar meteor candidates.
- Emphasis is on collecting high-resolution images and physical samples to reduce uncertainties.
- Full-sky monitoring is considered essential with telescopes in both hemispheres.
- Collaboration with private donors allows flexibility in research without government restrictions.
- Open approach includes searching for artificial lights and pollution on exoplanets.
- Personal criticism is seen as less productive than the construction of new data.
Reflections on pop culture and representations of extraterrestrials
Loeb mentioned discomfort with science fiction that violates laws of physics. Ele modeled an imaginary alien sculpture with a third eye, wings, third leg and technological components, different from common humanoid figures in films.
Biological bodies face challenges on long interstellar journeys, such as loss of bone mass in low gravity and exposure to radiation. Robôs with artificial intelligence would be more practical for such missions.
Bright lights in UFO reports require case-by-case analysis, with distance data to infer actual speed. Sem accurate information, it is difficult to distinguish natural phenomena from others.
Reports of objects moving between water and air deserve attention, as oceans remain little explored compared to the lunar surface.
The session took place on April 13, 2026. Loeb responded with details about his trajectory, methods, specific cases and vision for the future of research. Ele reinforced that progress depends on data, curiosity and a willingness to question established assumptions.
