³²S/³⁴S ratios for different environments. N113 - Gong et al. (2023); ST11, ST16 - Shimonishi et al. (2020); NGC 253 - Martín et al. (2021); NGC 4945 - Wang et al. (2004); Solar System - Anders & Grevesse (1989); CMZ, inner disc, local ISM, outer Galaxy - Yan et al. (2023); IRC+10216 - Mauersberger et al. (2004); W Aql, IRC+10011, IRC-10529 - Wallström et al. (2024); 15194-5115, 15082-4808, 07454-7112 - (Unnikrishnan et al. 2024); o Ceti, R Dor, W Hya, R Leo, EP Aqr - This work. Additionally, Danilovich et al. (2020) reported a ratio of 42 for the Galactic AGB star, IK Tau, which is not included in the plot due to the absence of measured uncertainties.