MUSE observations of comet 67P/Churyumov-Gerasimenko - A reference for future comet observations with MUSEC. Opitom, A. Guilbert-Lepoutre, S. Besse, B. Yang and C. SnodgrassA&A, 644 (2020) A143DOI: https://doi.org/10.1051/0004-6361/202039017