The Astrophysics Almanack is a comprehensive library containing dynamic models and equations of motion for various problems related to aerospace engineering and astrophysics, including aircraft flight dynamics, rocket equations, and orbital mechanics. The repository provides a structured collection of mathematical formulations, solvers, and computational tools designed for analysis and simulation. Additionally, it includes practical exercises and utility functions, such as optimization algorithms and orbital mechanics solvers, facilitating applications in research, engineering, and education.