This project aims to curate and summarize information on the state-of-the-art of “ocean world” research being conducted by astronomers and planetary scientists worldwide. Ocean worlds are any celestial body that contains a significant amount of liquid water, either at or below the surface. The only known planet to harbor life, Earth, is an ocean world. NASA suspects that ocean worlds provide one of the highest possible chances for finding life outside Earth, motivating a wide array of research and exploration into the subject. There are currently nine confirmed or suspected ocean worlds in our solar system: Earth, Europa, Ganymede, Callisto, Enceladus, Titan, Mimas, Triton, and Pluto. NASA has two missions planned for exploring ocean worlds of our solar system: the Europa Clipper and the Titan Dragonfly. Clipper will orbit Jupiter and investigate whether Europa could sustain life, while Dragonfly will explore the surface, atmosphere, and subsurface of Titan. Novel methods such as Clipper and Dragonfly are vital to exploring ocean worlds and advancing the search for life and are a natural next step beyond current remote sensing research. Some vital gaps still exist, particularly concerning the fate and evolution of ocean worlds: for example, NASA suspects that Venus may once have been an ocean world, but current research has not been able to confirm or refute this idea. This paper will particularly focus on these gaps and what methods may fill them.