Weak Lensing with a Billion Galaxies

Learn about the groundbreaking field of weak gravitational lensing and its applications in studying the distribution of matter across the cosmos in this 59-minute lecture from the Simons Foundation. Explore how the subtle distortions in the shapes of distant galaxies can reveal crucial information about dark matter and the large-scale structure of the universe. Discover the techniques and challenges involved in analyzing weak lensing signals from vast galaxy surveys containing billions of objects, and understand how this powerful tool helps cosmologists map the invisible components of our universe and test fundamental theories of gravity.