Astronomers report that the remnant of a supernova observed in 1181 contains unusual knot-like structures.

"850-year-old supernova from 1181 contains mysterious knots" — Live Science · Science & Medicine

18 Oct 2026

What it means

This story reports that astronomers using the Gemini North telescope in Hawaii have imaged the —the remains of a rare stellar explosion witnessed in 1181—and discovered an unexpected structure of pearl-like gas knots around a surviving '.' The knots are surprising because they are ordered rather than chaotic, challenging current models of this type of supernova (likely a white-dwarf merger, classified as Type Iax).

Accuracy & sourcesGrounded

The claim is based on a reputable secondary source (Live Science) summarizing a recent observational study from the Institute of Science and Technology Austria (ISTA). Multiple other science-news outlets (SciTechDaily, Discover Magazine) confirm the same details, pointing to a primary source that is likely a peer-reviewed paper or a major press release. The reported features—giant knots and a zombie star—are solid observational findings from Gemini North.

Astronomers report that the remnant of a supernova observed in 1181 contains unusual knot-like structures.

What it means

Accuracy & sourcesGrounded

How new

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