Interstellar comet 3I/ATLAS approaches Sistema Solar and has aroused global curiosity since its discovery. The object, detected in July 2025 by the ATLAS network at Chile, travels at about 26 kilometers per second and comes from outside our planetary system. NASA classified the visit as the third confirmed interstellar comet.
Scientists emphasize that 3I/ATLAS does not pose a danger to Terra. Sua minimum distance from the planet will be greater than 240 million kilometers. Perihelion, the closest point to Sol, occurred on October 30, approximately 210 million kilometers from Sol.
The chemical composition of the celestial body caught the attention of astronomers. Observações from the James Webb telescope identified a high amount of carbon dioxide in the gaseous envelope.
Unexpected trajectory generates speculation
The comet changed its path slightly at the end of November, heading towards the Júpiter region. The fact rekindled theories about a possible artificial origin, similar to those raised with the ‘Oumuamua object in 2017.
Astrophysicist Avi Loeb, of Harvard, suggested that the change in direction could indicate technological intervention. However, Russian and American experts ruled out this hypothesis after detailed analysis of the images.
Composition reveals origin in another star system
The James Webb telescope detected much higher than normal levels of CO2 in the comet’s coma. The Esse pattern differs from comets formed in our Oort cloud or the Kuiper belt.
The presence of typical gases, such as cyanide and organic molecules, confirms the icy nature of the nucleus. Estima is said to be more than 7 billion years old, older than Sistema Solar itself, which is 4.6 billion years old.
Detailed observation by probes at Marte
Orbital missions around Marte took advantage of the close pass to record high-resolution images. The equipment captured the structure of the dust stream and the clearest ever obtained from an interstellar visitor.
The photos show a long, bright tail, the result of heating as it approaches Sol. Visibility improved significantly after perihelion, allowing ground-based telescopes to monitor the early morning sky.
Advanced age intrigues researchers
Preliminary calculations indicate that 3I/ATLAS formed at least 7 billion years ago in another planetary system. The object was likely ejected by gravitational interaction with giant planets from its original star.
This temporal profile makes the comet a true cosmic fossil. Seu study provides data on chemical conditions in stellar systems formed in the early universe.
Safety confirmed by the American space agency
NASA reinforced that there is no risk of collision with Terra at any time on its current trajectory. The minimum approach distance will occur well beyond the orbit of Marte.
The object will continue its hyperbolic journey and will definitely leave Sistema Solar in the coming years. Astrônomos maintain continuous monitoring to refine orbital parameters.
- Minimum distance from Terra: > 240 million km
- Current speed: ≈ 26 km/s
- Perihelion: October 30, 2025
- Distance at perihelion: ≈ 210 million km from Sol
- Estimated age: > 7 billion years
- Highlighted composition: high CO2 content
Scientific legacy of the third interstellar visitor
The passage of 3I/ATLAS represents the third confirmation of an object coming from another star system after ‘Oumuamua (2017) and Borisov (2019). The Cada event adds important pieces to the understanding of interstellar dynamics and the Via Láctea.