Gravitational waves -- Analogy to fluid model Hello, I understand that fluid solution in astrophysics is an age old modelling structure to understand the dynamics of star and other stellar objects. I was reading an article on Gravitational waves which states that: This is because gravitational waves, like water waves, decrease in strength as they move away from the source. Even though they are weak, the waves can travel unobstructed within the 'fabric' of space-time. This how they are able to reach the Earth and provide us with information that light cannot give. I just want to ask, could this be another reason for using fluid solution in astrophysics? Thanks.