An astronomical observation made at Havaí has revealed unprecedented details of the interstellar object 3I/ATLAS, capturing a jet of matter that pulses with a precise and intriguing rhythm. The image, taken on November 28, 2025 by the KalopaStars observatory, shows an extremely fine and directed emission of material, behavior that defies conventional explanations for comets.
The high-resolution record allowed scientists to analyze not only the structure of the jet, but also confirm the periodic variations in brightness that had been monitored. Essas oscillations, which occur every 16.16 hours, are too intense to be caused solely by the rotation of its 2.8-kilometer core, suggesting an active and unknown internal mechanism.
The discovery places 3I/ATLAS at the center of an intense debate in the scientific community, as its anomalous characteristics differentiate it from other interstellar visitors already observed, such as ‘Oumuamua and 2I/Borisov. Continuous tracking of the object, which approached Terra in December 2025, has become a priority for astronomers around the world.
A rhythmic phenomenon in deep space
The most notable feature of 3I/ATLAS is its precisely timed brightness cycle. Every 16.16 hours, the object increases its luminosity significantly, a pattern that does not align with the simple reflection of sunlight off an irregular surface. Estudos indicate that, for the rotation of a nucleus to generate such a variation, it would need to be between 10 and 23 kilometers in diameter, much higher than the 2.8 kilometers measured for 3I/ATLAS. Essa discrepancy points to an internal energy source or a physical process that drives the ejection of matter at regular intervals. Most of the detected light, more than 99%, comes from the gas coma and jets, with the solid core being practically invisible in comparison. Essa dynamics suggest that the object is actively releasing material in a controlled manner, a behavior that makes it a natural laboratory for studying exotic cometary processes.
The characteristics of the interstellar jet
The image captured by KalopaStars reveals a jet with a surprisingly ordered geometry. Diferente from the turbulent and chaotic emissions often seen in comets from our Sistema Solar, the matter flow from 3I/ATLAS is straight, thin and highly collimated, maintaining its shape over long distances before dissipating. Essa linear structure suggests that matter is being ejected at a constant speed and from a very specific source at the surface of the nucleus.
Another detail that caught the researchers’ attention is the golden color concentrated near the nucleus, indicating a localized heat source. In traditional comets, heating is the result of diffuse solar radiation over the entire surface exposed to Sol, which would not explain this concentration of energy. The presence of a “hot spot” reinforces the hypothesis that internal processes, and not just solar influence, are governing the activity of 3I/ATLAS.
The origin of brightness pulsations
Investigations into the brightness pulsations, led by astronomers such as Avi Loeb, point to an active mechanism occurring within the object’s coma. Cada 16.16 hour pulse releases a new layer of dust and gas, which expands like a spherical shell.
These shells travel into space at an estimated speed of 440 meters per second, reaching a length of up to 25,600 kilometers before dissipating. It is the sequential formation of these structures that creates the variations in magnitude observed by telescopes.
What makes the phenomenon even more enigmatic is the variable direction of the jets. Previous Registros have shown that emissions do not follow the position of Sol, as would be expected. On a few occasions, the jets have been observed pointing directly toward Sol, a thermodynamically unlikely configuration for an icy body that sublimates due to solar heat.
This directional independence suggests that the energy source that powers the jets is not linked to solar illumination, but rather to an intrinsic characteristic of the object itself, the nature of which is still a complete mystery to the scientists who study it.
The role of the KalopaStars observatory
The observation on November 28, 2025, carried out at the KalopaStars observatory, at Havaí, was a milestone in the 3I/ATLAS study. The quality of the image allowed a detailed analysis of the jet’s morphology, revealing its almost perfect structure and the light gradient organized in the coma.
This record provided crucial data that is being used by international astrophysics teams to refine theoretical models about the object’s activity. The clarity of the capture helped to rule out some hypotheses and strengthen others, directing the next steps of the investigation.
Implications for astronomy
The study of objects like 3I/ATLAS is fundamental to understanding the formation of planetary systems beyond our own. Cada interstellar visitor carries with him information about his region of origin, offering a sample of materials and physical processes from other stars.
While ‘Oumuamua was a rocky, elongated object with no visible activity and 2I/Borisov behaved like a more traditional comet, 3I/ATLAS presents a unique set of features that do not fit into any known category. Sua pulsatile activity and its ordered jets open new questions about the diversity of smaller bodies traveling through the galaxy.
The scientific community is now faced with the challenge of explaining how such a small object can sustain such a regular and energetic ejection mechanism. Theories under debate range from nitrogen geysers sublimating beneath the surface to more exotic hypotheses, which still lack conclusive evidence.
Monitoring and next steps
Observatories around the world continue to monitor 3I/ATLAS in a coordinated campaign. The main objective is to build a long time series of observations to verify whether the 16.16 hour cycle remains stable or changes as the object moves away from Sol. Analysis of this data will be crucial to determine whether the orientation of the jets maintains its independence in relation to the solar position or whether it starts to follow a more predictable pattern.
Challenges to current cometary models
The anomalies presented by 3I/ATLAS represent a direct challenge to models that describe cometary activity. Traditional comet physics, based on the sublimation of ice by solar radiation, cannot satisfactorily explain the rhythmic pulsation, localized heat source and directional independence of the jets observed in this interstellar object.
These observations force scientists to consider new physical mechanisms that may be at work in bodies formed in environments other than our own. The 3I/ATLAS investigation could therefore lead to a fundamental revision of our understanding of how comets function and evolve as they travel through space.
