Chemistry Reveals Interstellar Comet Originated From an Ancient Star System

Chemical analysis has revealed that a comet that passed near Earth on October 30, 2025, originated from outside our Solar System — likely from an old star somewhere in the Milky Way. The frozen nucleus of ice and dust was ejected from its home system by orbital mechanics and travelled through interstellar space before entering our Solar System. The finding sheds light on the composition of distant stellar systems.

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More on this topic

🔬 Science New study: Earth likely won't be swallowed by the Sun in 5 billion years Wired · 22d ago 🔬 Science Interstellar comet has chemical composition unlike anything seen before ScienceAlert · 25d ago 🔬 Science Interstellar comet discovered is 12 billion years old — older than our solar system Phys.org · 29d ago