Notes from Independent Study Meeting
                      Jan 24, 2022

Present: Richmond, Dayal

  - Dayal shows results of code in Sun+Earth system

          using timestep of 1000 seconds
          look at x, y, z values
          we verify that Earth makes a bit more than two complete
             cycles around the Sun.  Good!

  - goal for next meeting (Thu, Jan 27): investigate changing timestep
   
          modify timestep values to 0.01, 0.1, 1, 10, 100 times current value
          how does time to run simulation change?
          compute starting value of total energy = KE + PE 
          compute ending   value of total energy = KE + PE 
          compute CHANGE in total energy from start to end
          how does this CHANGE in total energy depend on timestep?

  - deliverables:
          a) table showing time-to-run-program as function of timestep
          b) table showing change-in-energy as function of timestep

  - stretch deliverables
          c) make a graph showing the (x,y) position of Earth over 2 years