Nature Astronomy, Published online: 05 November 2024; doi:10.1038/s41550-024-02410-9

Wenzel et al. detect radio signatures of two forms of cyanopyrene, a small molecular sheet of carbon, which can be used as indicators of the abundance of pyrene. Their findings suggest that small polycyclic aromatic hydrocarbons must be formed in or transported to the cold interstellar medium.

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