Interstellar Comet 3I/ATLAS Sends Mysterious Signal
The newly discovered object 3I/ATLAS, officially designated C/2025 N1, has taken the astronomical community by surprise.
Detected in early July 2025 by the ATLAS survey in Chile, it quickly became clear that this wasn’t an ordinary comet. Its hyperbolic orbit, meaning it is not gravitationally bound to the Sun, confirmed that 3I/ATLAS came from beyond our Solar System.
It is only the third interstellar object ever observed, following 2017’s ʻOumuamua and 2019’s 2I/Borisov.
The discovery triggered an immediate international response.
Author summary: Comet 3I/ATLAS surprises astronomers.
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