Science

Our sun's undiscovered stellar nemesis is still out there, says physicist

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 09/11/2026, 20:25:25 UTC.

Briefings

A physicist claims that long-period comets originating from a theoretical Oort cloud are still present in space, challenging the long-held belief that such objects have been fully depleted. The evidence suggests these comets remain active and capable of causing extinction-level impacts on Earth, despite being thought to have been scattered away long ago.

Key points

• Long-period comets originating from a theoretical Oort cloud are still present in space, challenging the belief that they have been fully depleted.
• These comets are capable of causing extinction-level impacts on Earth, as they remain active and capable of delivering large impactors.

Context

The Oort cloud is a theoretical spherical cloud of icy cometary objects located up to 1.6 light-years away, containing trillions of objects. This finding suggests the cloud is still populated by active comets that could impact Earth.

Limitations

The evidence is limited to a single physicist's claim without independent verification or observational data. The specific comet trajectories or impact probabilities are not quantified, and the timeline of the comet's existence remains unconfirmed.

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