In ApJ (Astrophysical Journal) for Dec 1 2025 (vol. 994, #2):
Huang, Z. Hirabayashi, M. Orlando, T. M. Micrometeoroid Impacts: Dual Pathways for Iron Reduction and Oxidation on Lunar and Asteroidal Surfaces 240 ae19e6
Madeira, G. Morgado, B. E. Pereira, C. L. et al. Dynamical Environment and Stability around Centaur (2060) Chiron 268 ae169e
I normally stay away from Centaur objects, but here we are. Read Madeira et al. if you please; if rings are ever found around an (unambiguous) asteroid, here’s how we would study them.
Iron particles, now that’s blog-worthy. Space weathering was suspected on Earth’s Large Achondrite satellite, indirectly inferred by Galileo at Gaspra and Ida, and finally confirmed using the Hayabusa sample. Space weathering converts iron ‘ores’ (ferrous silicates) into nanophase iron particles (npFe). But there’s more to it than that, just like there’s more than one iron-bearing silicate rock. Madeira et al. show that secondary reactions are more than just trivial.