RAS Ordinary Meeting

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Talks: Dr John Armitage (Institut de Physique du Globe de Paris), RAS Research Fellowship
Can variations in the Earth's orbit create stratigraphic sequences? Ms Jane MacArthur (University of Leicester)
The first regolith breccia meteorite from Mars 2017 EDDINGTON LECTURE
Professor Kathryn Johnston (Columbia University)
Physical Manifestations of Evolution, Regularity and Chaos In and Around Our Galaxy Our Galaxy is thought to be dynamically young with a fairly smooth potential dominated by a nearly spherical dark matter halo that has evolved little in the last several billion years. These attributes broadly suggest that potential evolution and dynamical chaos should have negligible influences on the orbits of its constituent stars, as well as on the stellar structures they collectively support. This talk reviews some recent results which point to signatures of Galactic evolution and the chaotic nature of stellar orbits that can be (and have been) observed.