Gravitational Wave Astrophysics: starting Observation Run 4

Gravitational Waves were originally predicted in the 1910's by Einstein, and measured directly for the first time in 2015. In the years since, they have become a household acquaintance and a cornerstone of astrophysical observations and discoveries. I will present their background, history, and how they have begun to shape current day astrophysics, including what we expect (and hope) for the new Observation Run