3I/ATLAS, formally designated C/2025 N1 (ATLAS), is an interstellar comet discovered in July 2025 by the ATLAS survey system. It is only the third confirmed interstellar object detected passing through our solar system, following 1I/ʻOumuamua and 2I/Borisov. The comet is on an unbound, hyperbolic trajectory, meaning it is not gravitationally tied to the Sun and will eventually leave our solar system.
This object is scientifically notable because it provides a rare, direct sample of material from another star system. Studying its composition and behavior offers astronomers a unique window into the building blocks and physical processes of planetary systems beyond our own. It poses no threat to Earth, as its closest approach will be no nearer than 1.8 astronomical units.
The comet recently returned to the news following a major update from NASA, which included the release of new photographs captured by the Lucy spacecraft. These detailed images have sparked significant public discussion and, in some cases, unfounded speculation about the object's nature, leading NASA to officially address and debunk rumors that it is an artificial "alien spaceship."
The scientific community emphasizes that 3I/ATLAS is a natural comet. The new data is expected to provide valuable insights, but the comet is not anticipated to become bright enough to be seen with the naked eye or binoculars from Earth.
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