Born Thick, Settled Thin

Show notes The Milky Way's disc settled in two stages; metal-rich gas around Sgr A*; two mirror-image simulated universes; shadows in the Orion Bar; quick hits on Hera, Uzbekistan and Artemis; Orionid-night skywatch. Sources · IAC — Milky Way's disc formed in two very distinct stages — https://www.iac.es/en/outreach/news/research-iac-reveals-milky-ways-disc-formed-two-very-distinct-stages · Mirabal et al. — ApJL 1010 L38 — https://doi.org/10.3847/2041-8213/aeb0a3 · McGill — Gas around Milky Way's central black hole is rich in metals — https://www.mcgill.ca/newsroom/channels/news/gas-around-milky-ways-central-black-hole-rich-metals-study-finds-375101 · Ford et al. — AJ (DOI) — http://doi.org/10.3847/1538-3881/ae994d · Ford et al. — arXiv 2605.13995 — https://arxiv.org/abs/2605.13995 · Argonne — Aurora powers two of the largest cosmological simulations — https://www.anl.gov/article/argonnes-aurora-supercomputer-powers-two-of-the-largest-cosmological-simulations-to-date · UDE — New 3D model reveals hidden chemistry of stellar nurseries — https://www.uni-due.de/2026-10-16-publication-aa-brandt-gaches-3d-model-en · Gaches et al. — A&A 714 A295 — https://doi.org/10.1051/0004-6361/202660769 · ESA — Finding Hera's way: Flight Dynamics team in action — https://www.esa.int/Space_Safety/Hera/Finding_Hera_s_way_Flight_Dynamics_team_in_action · Kun.uz — Uzbekistan joins Artemis Accords — https://kun.uz/en/news/2026/10/19/uzbekistan-joins-artemis-accords-on-peaceful-space-exploration · NASA — To discuss Artemis acceleration, status of upcoming Moon missions — https://nasa.gov/news-release/nasa-to-discuss-artemis-acceleration-status-of-upcoming-moon-missions · The Planetary Society — Night sky, October 2026 — https://www.planetary.org/night-sky/night-sky-what-to-see-this-month

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