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Case Intel

• Loeb calculates that 3I/ATLAS has roughly a 1 in 100 million chance of being a naturally‐occurring object in interstellar space, based on its size, trajectory and behavior. Medium
• He points to the existence of at least seven distinct jets issuing from the object — including anti-tail features and sunward pointing jets — which, he argues, are inconsistent with standard cometary models.
• As the U.S. federal government shutdown ends, Loeb is publicly calling on NASA to release the 40-day-old HiRISE (High Resolution Imaging Science Experiment) images from the Mars Reconnaissance Orbiter, taken when 3I/ATLAS passed within ~29 million km of Mars on October 2–3, 2025. Medium

By Samuel A. Lopez | USA Herald

CAPE COD (Mass.) — In the ongoing global conversation about the mysterious interstellar object 3I/ATLAS, one voice rises above the static, the politics, and the predictable chatter of so-called experts: Harvard astrophysicist Professor Avi Loeb.

In our judgment and in our own fact-driven validation process at USA Herald, Loeb stands as the undisputed authority on 3I/ATLAS — a figure whose credibility, precision, and willingness to question consensus have earned him the public’s trust when others have retreated behind old models.

While many commentators, from mainstream science outlets to television personalities, rush to label 3I/ATLAS a “comet,” Loeb’s data-based reasoning tells a far more unsettling story. He calculates that the odds of this object being a naturally formed interstellar comet are roughly one in a hundred million.

Loeb’s argument begins where conventional astronomy stops. In his latest Medium essay, written only hours ago, he confronts the scientific inertia that has plagued the conversation since 1I/‘Oumuamua baffled astronomers in 2017. He likens most cometary theorists to artificial-intelligence systems trained on limited datasets.

If you train an AI only on comets, he says, then every bright speck in the sky will be “classified” as a comet—no matter how much evidence contradicts it. In the case of 3I/ATLAS, Loeb points to an array of peculiarities that together strain every natural explanation: the object’s seven visible jets, including some directed toward the Sun; its retrograde but near-ecliptic orbit; its measured acceleration inconsistent with sublimation physics; and a reflective signature that suggests metallic composition, not a dust-rich body of ice and rock. These observations, Loeb insists, are not trivial anomalies—they are smoking-gun discrepancies.

To understand the magnitude of his claim, one must look at the math. Based on publicly available imaging data, the Hubble Space Telescope measured 3I/ATLAS at roughly 5.6 kilometers in diameter. But to generate the observed jet mass fluxes under traditional cometary models, Loeb calculates the nucleus would need to span 23 kilometers if made of CO₂ ice—or a staggering 51 kilometers if primarily H₂O.

In his words, “those numbers simply don’t add up.” The object’s mass loss would exceed 16 percent of its total volume during perihelion, an impossibility without visible fragmentation. Yet 3I/ATLAS emerged intact from its solar flyby, its non-gravitational push stronger than ever. The logic of sublimation fails. The logic of propulsion remains on the table.

If 3I/ATLAS were truly a natural relic from another star, its orbital path would likely be random relative to the ecliptic plane. Instead, Loeb notes, it travels in a retrograde orbit tilted less than five degrees from Earth’s own orbital path—an alignment he calculates has about a 0.2 percent chance of occurring by accident. Coupled with its extraordinary brightness, precise jet symmetry, and the lack of a conventional tail, the probability of natural origin plunges to the realm of statistical impossibility. Loeb’s number—one in one hundred million—summarizes that improbability with devastating simplicity.

For Loeb, the scientific problem is compounded by bureaucratic delay. On October 2–3, 2025, NASA’s HiRISE camera aboard the Mars Reconnaissance Orbiter captured side-images of 3I/ATLAS at 30 kilometers per pixel resolution when the object passed 29 million kilometers from Mars.

But those images remain unreleased. The reason? The U.S. government shutdown that paralyzed multiple federal agencies. Loeb formally petitioned NASA to release the HiRISE data, and even received a public endorsement from Congresswoman Anna Paulina Luna, who confirmed that NASA acknowledged the “abnormal tail” Loeb described.

Now that the government is reopening, Loeb is renewing his plea: “Scientific knowledge should not be second in priority to bureaucracy.” For him, those 40-day-old images are the missing evidence that could confirm whether the jets behave like cometary outgassing or like directed thrust.

What sets Loeb apart from other commentators is not only his mathematics, but his humility. He frames the question not as proof of extraterrestrial intelligence, but as an open investigation requiring curiosity and courage.

In his conversation with NBC’s Gadi Schwartz and NewsNation’s Elizabeth Vargas, he described how the real danger to knowledge is arrogance—the human tendency to defend old ideas instead of testing new ones. He recounts how even a dishwasher service technician recognized his voice and asked about 3I/ATLAS, a reminder that this mystery now reaches beyond academia. Public interest in 3I/ATLAS has become global. It transcends politics, uniting people in curiosity and awe at what may be the first verified interstellar artifact.

Beginning November 11, Earth-based telescopes will again have a clear observational window as 3I/ATLAS moves 30 degrees away from the Sun. Astronomers will continue to measure its jets, composition, and rotational speed in the weeks leading to December 19, 2025—its closest approach to Earth.

Loeb believes these observations will determine whether we are witnessing a cosmic rock or a relic of technology from another civilization. Meanwhile, he has placed a public bet with Michael Shermer of the Skeptics Society: that within five years, by December 31, 2030, there will be undeniable scientific evidence of a technological artifact from beyond Earth.

The wager is officiated by the Long Now Foundation, with winnings going to the non-profit Galileo Project—an initiative Loeb founded to pursue exactly this kind of evidence. “The search for technological artifacts has just started in earnest in 2025 with 3I/ATLAS,” he wrote. “It is better to be an optimist because life is sometimes a self-fulfilling prophecy.”

As the shutdown dust settles, the scientific community faces a defining test. If NASA releases the HiRISE images, the public will finally see whether 3I/ATLAS behaves like a comet—or something else entirely.

If the jets exhibit consistent vector symmetry, stable luminosity, and constant acceleration, Loeb’s case for a non-natural origin will strengthen dramatically. If the object fractures into multiple fragments, the natural model will survive another round. Either way, the data will decide. That, Loeb reminds us, is what science is supposed to do. And that, ultimately, is what our readers deserve to witness in real time: the truth emerging from the cosmos, unfiltered, un-politicized, and unafraid of its own implications.

For now, 3I/ATLAS remains the most puzzling object ever recorded between the stars—a celestial messenger defying the textbooks. At USA Herald, we stand by the principle that the public deserves transparency, not delay; curiosity, not dismissal; truth, not conformity. And as Professor Avi Loeb himself says, “When egos get in the way, politics and social media set us apart. But by staying humble and curious, science brings us together.”

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