Theoretical astrophysics

Theoretical Astrophysics is the discipline that seeks to explain the phenomena observed by astronomers in physical terms. With this purpose, theoretical astrophysicists create and evaluate models to reproduce and predict the observations. Theoretical astrophysicists use a wide variety of tools which include analytical models (for example, polytrope?s to approximate the behaviors of a star) and computational numerical simulations. Each has some advantages. Analytical models of a process are generally better for giving you insight into the heart of what is going on. Numerical models can reveal the existence of phenomenon and effects that you would not otherwise see.

In evaluating astrophysical models, one should keep in mind that simple is better.

Topics studied by theoretical astrophysics include: star dynamics and evolution; galaxy formation; large-scale structure of matter in the Universe; origin of cosmic rays; and cosmology.

For an example of an astrophysical theory (although one which is not generally accepted by the astrophysical community), see MOND. --- /talk?