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Is 3I/ATLAS an Alien Craft? Harvard Scientist Avi Loeb Reveals

Harvard’s Avi Loeb explores mysterious interstellar object 3I/ATLAS, its unusual tail and potential alien spacecraft implications.

Published By: Amreen Ahmad
Last Updated: October 27, 2025 01:07:11 IST

Avi Loeb, who is an astrophysicist at Harvard, has recently shared what he thinks regarding the very mysterious interstellar object, 3I/ATLAS which has been all over the news among professional scientists. The researchers from the Nordic Optical Telescope in Spain’s Canary Islands have made new observations and shown unusual behavior the interstellar object’s anti-solar tail used to point toward the sun now seems to have turned.

This unexpected turn of events has reopened the debate on the origin and nature of this cosmic visitor. Loeb’s latest theory by omission suggests that perhaps the very behavior of the object should lead one to suspect that it might even be moving under its own direction he has called this phenomenon a potential high-stakes Black Swan event.

3I/ATLAS: Origin & Observation

3I/ATLAS is considered to have originated from beyond the solar system and it was first identified by the ATLAS survey telescope in July 2025. The imaging that occurred later in September at the Nordic Optical Telescope gave a fresh insight into the structure of this object.

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The comet had displayed a rare anti-solar tail but the latest footage shows that this tail suddenly went into reverse. Such kinds of observations usually do not happen in normal comets and have raised further discussion as to whether any normal explanations can be simply counted for such things.

Singular Characteristics & Technosignature Potential

The object displays several unusual features including a gas jet shooting toward the Sun, the absence of typical cometary tail and the ejection of nickel tetracarbonyl, a never before seen chemical in natural comets. Loeb and his fellow colleague, Adam Hibberd argue that if the object were an alien spacecraft slowing down, the observed anti-tail could work as a braking thrust, leading to the tail’s reversal after crossing perihelion. It could then essentially become a technosignature is an unusual phenomenon indicative of controlled maneuvering designed to maintain a heliocentric orbit between Mars and Jupiter.

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Scientific Debate & Warning

While many people excitedly ponder Loeb’s hypothesis at the global level, most mainstream space agencies remain skeptical. NASA even confirmed that 3I/ATLAS would safely fly past Earth without posing any immediate danger to the planet. A majority of scientists maintain that the characteristics and movements exhibited by the object may in fact still be consistent with the natural physics of cometary activity, without reference to extraterrestrial involvement.

Loeb’s particular theory is a reminder that nowhere in the universe is there the say-so in terms of too much studying. There will always be surprises and well-documented ones must sometimes challenge that to settle the case. Current observations of 3I/ATLAS have served to highlight open inquiry and the hard and rigorous research that needs to be done regarding the unknown.

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Disclaimer: This article presents theories and observations; claims about alien activity are speculative and not confirmed by official space agencies.

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