Astronomer Jorge Márcio Carvano from the National Observatory clarified information about the interstellar comet 3I/ATLAS in a recent interview. The object, discovered in July 2025 by the ATLAS project, poses no risk to Earth and will pass about 270 million kilometers from the planet. Carvano highlighted that sensational rumors circulate on the internet, but scientific data confirm its natural nature.
The comet is the third identified interstellar object, with a hyperbolic orbit that will lead it to permanently exit the Solar System. Observations reveal a dust coma and ices, typical of comets, with no evidence of artificial origin.
- Discovery occurred in the first half of July 2025.
- Designation C/2025 N1 reflects the detection period.
- Nucleus estimated between 200 meters and 3 kilometers in radius.
Visitor from another star system
The 3I/ATLAS formed around a distant star and was ejected during planetary formation. It has traveled through interstellar space for billions of years. Researchers monitor the object to study chemical compositions different from local comets. The perihelion passage occurred on October 29, 2025.
Typical structure of comets
Comets consist of ices, dust, and organic compounds. As they approach the Sun, ices sublimate and release material.
This process forms the coma and tails that extend for thousands of kilometers. Gas jets slightly alter the orbit. Dust reflects sunlight, increasing visible brightness. Nuclei generally measure up to 10 kilometers, similar to irregular shapes.
Debunking sensational claims
Rumors mention anomalies in trajectory and mass of the comet. Carvano explains that low orbital inclination is coincidence, without indications of intentional maneuvers. Initial size estimates based on brightness without considering the coma. Updated data reduce the radius to values compatible with known comets.
Detected compounds follow varied proportions, expected in objects from other systems.
Observations and astronomical campaigns
The ATLAS project from the University of Hawaii detected the comet. International network IAWN conducted a campaign on October 21 to refine measurements. These actions test observation protocols and analyze jet effects. There is no collision risk, even with minimal deviations.
Telescopes like Gemini South captured detailed images of the coma.
Role of space agencies
NASA funds part of the observations but does not control all global astronomical activities. Other agencies and independent researchers contribute data.
Transparency ensures public disclosure of information. The Minor Planet Center coordinates orbit reports.
Trajectory and origins clarified
Interstellar orbits vary in inclination, depending on original ejection. The 3I/ATLAS crosses the ecliptic plane but follows a natural path.
Comparisons with 1I/’Omuamua and 2I/Borisov show diversity without artificial patterns. Studies continue to map variations in sublimation.
The comet offers a unique window into distant planetary systems. Astronomers plan additional spectroscopic analyses in the coming months.
