Theoretical physics is a branch of physics which employs mathematical models and abstractions of physical objects and systems to rationalize, explain and predict natural phenomena. This is in contrast to experimental physics, which uses experimental tools to probe these phenomena.
Where are all the theoretical physicists predicting the eventual evolution of all these exo-planets (evolved stars): http://exoplanet.eu/
Where is all the theory predicting the eventual evolution of Jupiter? Saturn? Neptune? Uranus? Earth?
IT DOES NOT EXIST!
Do not take my word for it, find on the internet any where that predicts the eventual evolution of Neptune... Go ahead! Surely an object more massive and grander than the Earth itself would have some sort of significance in the "theoretical physics" department...
Objects like this are ignored in the "theoretical physics" department. They would rather worry about things that don't exist such as black holes, dark matter, dark energy, etc.