[astro-ph.GA] Sulfur (S) chemistry in the interstellar medium remains poorly constrained due to the longstanding “missing sulfur” problem, where a significant fraction of cosmic sulfur in molecular clouds remains unidentified.
![Schematic representation of the evolution of sulfur in light of our experiments. The diagram provides a conceptual overview of sulfur depletion driven by visual extinction.-- [astro-ph.GA]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/Thermally.png?resize=1200%2C719&ssl=1)
[astro-ph.GA] Sulfur (S) chemistry in the interstellar medium remains poorly constrained due to the longstanding “missing sulfur” problem, where a significant fraction of cosmic sulfur in molecular clouds remains unidentified.