# DAY 2

# Lecture Notes

#### Day 2 Intro Slides

Reminder of what we have done/some intro to what we are doing today.

#### Day 2 Intro Slides (Part 2)

A reminder of what we have discovered so far: the importance of the time step! Lets think about conserved quantities...

# Code

#### Plot Analytical + Numerical 2-Body Problem + Indexing Hints

Some python code for plotting an elliptical solution for the 2-Body problem from Day 1. Some hints for setting up indexing for each planet.

# Resources

#### Some 2-Body Problem Notes

Some notes on the 2-Body problem from Massimo Ricotti's computational astrophysics class.

#### Notes on Integration in N-body

Some notes on general integration of N-Body problems from Massimo Ricotti's computational astrophysics class.

#### Integration of ODE's

Some notes on integration methods for ordinary differential equations from Massimo Ricotti's computational astrophysics class.

#### Indepth Discussion of Several Integrators

Goes over some pros/cons of different sorts of integrators. Hermite integrators are discussed in section 2.3.2.