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Track 3I / ATLAS , the newly discovered interstellar object flying by Earth in 2025. Real-time countdown, news updates, educational resources, and astronomical insights. Related: Interstellar comet 3I / ATLAS , captured by NASA's Hubble Space Telescope captured on July 21 2025. (NASA, ESA, David Jewitt (UCLA); Image Processing: Joseph DePasquale (STScI)) When it was first detected on July 1 2025 by the Asteroid Terrestrial Last Alert System (or " ATLAS "), one of the first questions people asked was "but is it aliens?". Track 3I / ATLAS interstellar object live with NASA & ESA verified data. Real-time analytics, orbital tracking, composition analysis, discovery timeline, water detection, scientific observations. NASA confirms the interstellar object 3I / ATLAS poses no threat to Earth, despite viral speculation. Scientists and the UN are monitoring the rare visitor to study its alien origins and composition.