Nature Astronomy, Published online: 07 November 2023; doi:10.1038/s41550-023-02121-7

Theories predict that core asphericity must be involved in core-collapse supernova explosions; however, the shape of these explosions has not been directly observed. The distribution of the explosive burning ash has now been revealed using nebular spectroscopy, indicating that a collimated structure is common in many stellar explosions.

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