Explore the groundbreaking discovery of gravitational waves in this keynote talk from EuroPython 2016. Delve into the half-century-long search for these elusive phenomena, culminating in the Laser Interferometer Gravitational-wave Observatory's (LIGO) historic observation on September 14, 2015. Learn about the merger of two black holes that produced the first detected gravitational wave signature, marking the beginning of gravitational wave astronomy. Discover the intricate details of LIGO's technology, including Michelson interferometers, mirrors, lasers, and strain spectrum analysis. Gain insights into the role of Python in enabling this monumental scientific achievement, from data analysis and instrument control to automation and multiprocessing. Examine the implications of this discovery for future research, address concerns about potential malicious use, and understand the importance of open-source software in advancing scientific knowledge. Engage with complex concepts such as General Relativity, displacement sensitivity, and black hole modeling while appreciating the utility of gravitational wave detection in unraveling the mysteries of the universe. Read more