An intense debate has shaken the space community over the Avi Loeb's accusationsHarvard professor, that NASA would be withholding key data about the interstellar object 3I/ATLAS. The controversy revolves around an image obtained by the orbiter's HiRISE camera Mars Reconnaissance Orbiterwhich, according to the scientist, has not been published.
While the agency insists that 3I/ATLAS behaves like a comet And although it poses no danger, the discussion has escalated in the media and on social networks. In Europe, teams from the ESA and associated observatories are closely monitoring the case, focusing on the transparency and data release deadlines scientists.
What do we know about 3I/ATLAS
3I/ATLAS is the third interstellar object identified after ʻOumuamua (2017) and Borisov (2019). It was detected in July by the ATLAS system, and since then orbital models indicate a hyperbolic trajectory, typical of a visitor from outside the Solar System.
Loeb's accusation and the image of HiRISE
The core of the disagreement is a photograph taken on October 2 by HiRISE, Aboard the Mars Reconnaissance Orbiterwhen the object passed relatively close to Mars' orbit. Loeb claims to have formally requested the data from the science team and received no response, something which, in his opinion, hinders independent verification.
Meanwhile, skeptical voices such as that of Brian Cox They recall that supposed “anomalies” (such as variations in brightness or direction) are usually explained by processes natural comments, included jets of gas and dust by heating up in the sun. The methodology, they maintain, requires complete and calibrated data before issuing definitive verdicts.
Cover-up or simple bureaucratic gridlock?
Requests for data from interplanetary instruments usually dilate weeksespecially if they coincide with complicated administrative periods. The controversy erupted amid a government shutdown in the US, a circumstance that could slow down procedures and communications in federal agencies such as NASA.
Furthermore, HiRISE is not designed to track objects crossing the inner Solar System at high speed; its capabilities, while remarkable, have optical and tracking limitationsNASA has reiterated that the 3I/ATLAS “it poses no threat"and that its behavior is consistent with that of an active comet."
Europe takes positions
The European Space Agency (ESA) and observatories of the European consortium, such as those managed by ESO, have strengthened monitoring with coordinated campaigns from the southern hemisphere and other latitudes. The goal is to refine photometry, color, and degassing rates, contributing independent context to the set of global measurements.
The European scientific community emphasizes the need for archives to be available with calibration and complete metadataso that academic teams can test hypotheses under reproducible standards. This open data culture is seen as the best vaccine against media speculation.
What about the alleged “anomalies”?
Some accounts have highlighted a jet of material directed towards the Sun, a kind of "anti-tail", which would later have evolved into a conventional tailThese types of geometries can occur due to perspective effects, dust dynamics, and variations in activity commentary.
Regarding composition and color changes, specialists urge caution: without spectra and homogeneous reduction, attributing “unnatural” behaviors is prematureThe explanation by degassing of volatile ices and fragmentation of the core remains, to this day, the working hypothesis more parsimonious.
Key dates and security
The perihelion passage occurred at the end of October, and the closest approach to Earth will be in December, at more than 700 times the lunar distanceThe historical records confirm that there are no risky trajectories and that the object will return to the interstellar space after his visit.
For Europe, this transit is a golden opportunity to test alert and coordination protocols between agencies and observatories. The orderly collection and release of data is crucial. improves preparedness in anticipation of future interstellar visitors and strengthens international cooperation.
Beyond the noise, the case has brought to the forefront the transparency in scienceLoeb demands immediate access to a specific image; NASA affirms that 3I/ATLAS is a comet and that there is nothing to hide; the ESA and European centers request robust and verifiable data. Between these three forces—public demand, institutional caution, and scientific method— the story of this visitor from another star is being written.
