Almost forgot Planetary And Space Science for 15 Nov (vol. 268). The title doesn’t post ahead, chronologically, like lots of other journals.
Murphy, B. P. Opitom, C. Snodgrass, C. et al. Recent Chemo-morphological coma evolution of comet 67P/Churyumov-Gerasimenko Art 106178 .2025.106178
Comet Churymov-Gerasimenko holds a special place. It didn’t just get a space mission, which wasn’t just a flyby. The Rosetta probe orbited 67P/C-G for an entire perihelion apparition, watching the body activate as it warmed, then deactivate as it receded back to the outer Solar System. We thus know of its broad morphology, and some specifics of its activity. For instance, 67P’s two lobes slightly differ in composition. When ‘summer’ (such as it is) dawns on one hemi-‘sphere’ versus another, the coma and tail then display that difference in volatile chemicals. We saw hints of this at other comets, but only at 67P did we get this ‘ground truth’ for our current, telescopic studies. Studies like Murphy et al.