He 3I/ATLAS (C/2025 N1) is the third source object interstellar confirmed in history, afterwards ‘Oumuamua and Borisov. It is an active comet consisting of a core of ice and dust formed in a distant star system. In contrast to the comets in our system, it follows a hyperbolic trajectorymeaning it is traveling at such an extreme speed (150,000 mph) that the Sun’s gravity cannot hold it. It is a fleeting visitor that passes through our cosmic neighborhood only once before returning to space forever.
Although he December 19, 2025 It is the closest point to Earth and its observation poses special challenges:
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