Workshop for Erasmus students, October 2019, Munkkiniemen yhteiskoulu. [edit. 9.10. corrected some errors in varible names, changed the story to work without vectors][edit 20.10 at tegel, berlin. fixed some errors and added some explanations to the story.] I tested this with Munkka’s Erasmus 8th Graders. They were good. Inner planets in Wikipedia Look at the Continue reading