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The Biggest Cosmic Map - Chris Lintott

00:00 // Introduction 01:11 // Gaia’s Mission 02:37 // The History of Mapping the Sky 02:54 // Early Astronomical Maps 07:35 // The Shift to Scientific Mapping 10:54 // Measuring Distances: Parallax 19:19 // The First Success in Measuring Parallax 20:36 // Gaia’s Work in Mapping the Galaxy 23:12 // Revealing the Milky Way’s Structure 24:05 // The Warped and Wobbling Galaxy 26:17 // The Milky Way’s Past Collisions 30:42 // How Collisions Shaped Our Solar System 35:13 // The Milky Way’s Mergers 36:37 // Gaia’s Local Discoveries 38:09 // Mapping Planets and Asteroids 44:36 // The Future of Space Mapping Watch the Q&A session here:    • Q&A: The Biggest Cosmic Map - Chris L...   Mapping the stars is, perhaps, the oldest of astronomical pursuits, but it has been perfected by the European Space Agency's Gaia mission, which is providing an exquisitely precise map showing the positions and movements of the nearest two billion stars. Starting with a history of mapping the cosmos, this lecture describes the new and dynamic history of our Milky Way galaxy that results, and will move to explaining the dynamic and growing nature of our galaxy. This lecture was recorded by Chris Lintott on 26th February 2025 at Conway Hall, London Chris is Gresham Professor of Astronomy. He is also a Professor of Astrophysics at the University of Oxford, and a Research Fellow at New College. The transcript of the lecture is available from the Gresham College website: https://www.gresham.ac.uk/watch-now/b... Gresham College has offered free public lectures for over 400 years, thanks to the generosity of our supporters. There are currently over 2,500 lectures free to access. We believe that everyone should have the opportunity to learn from some of the greatest minds. To support Gresham's mission, please consider making a donation: https://www.gresham.ac.uk/get-involve... Website: https://gresham.ac.uk Twitter:   / greshamcollege   Facebook:   / greshamcollege   Instagram:   / greshamcollege   Support Us: https://www.gresham.ac.uk/get-involve...