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Explore the concept of peculiar velocity in cosmology through this hour-long lecture that examines how galaxies move relative to the expanding universe. Learn about the fundamental distinction between recession velocity due to cosmic expansion and the additional motions of galaxies caused by gravitational interactions with nearby matter. Discover how peculiar velocities provide crucial insights into the large-scale structure of the universe, dark matter distribution, and cosmic flows. Understand the observational techniques used to measure these velocities and their significance in testing cosmological models and theories of structure formation.
