Massive astrophysical objects governed by subatomic equation

[Jim__]

3. Why do you think that would lead to a better approximation?

My understanding is that their major concern is the orbital evolution of gravitationally interacting objects. From the article:

As an analogy, in our own solar system one can imagine breaking each planet into pieces and spreading those pieces around the orbit the planet takes around the sun, such that the sun is encircled by a collection of massive rings that interact gravitationally. The vibrations of these rings mirror the actual planetary orbital evolution that unfolds over millions of years, making the approximation quite accurate.