Explore the fascinating world of gravitational waves in this comprehensive lecture by Professor Sheila Rowan. Delve into Einstein's General Theory of Relativity and understand how these ripples in space-time are produced by some of the most energetic phenomena in the universe, including black holes, neutron stars, and supernovae. Learn about the groundbreaking detection of gravitational waves by the Laser Interferometer Gravitational-wave Observatory (LIGO) and its implications for the future of astronomy. Discover the nature of gravitational waves, their sources, detection methods, and the potential impact on our understanding of the universe. Gain insights into ultra-sensitive mechanical systems, materials with ultra-low mechanical loss, and the construction of mechanically-stable optical systems for interferometric applications. Examine the gravitational wave spectrum, properties of black holes, and the concept of strain in space. Explore the LIGO observatories, advanced detector networks, and the process of generating and distributing prompt alerts. Investigate the prospects for future observing runs, science questions to be answered, and the global network of gravitational wave facilities. Conclude with a discussion on the composition of the universe and the matter we understand. Read more