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Our sun's undiscovered stellar nemesis is still out there, says physicist
Our sun's undiscovered stellar nemesis is still out there, says physicist
Long-period, high-inclination comets of the sort that can cause extinction-level impacts here on Earth have long been thought to originate from a theoretical Oort cloud. That is, a roughly spherical cloud of icy cometary objects that number in the trillions at distances that extend up to 1.6 light-years away.
phys.org/news/2026-11-sun-undiscovered-stellar-nemesis-physicist.html