Click in space to move the camera Click on an object to Start Tracking Space to Stop Tracking Up and down arrow keys to zoom in / zoom out Click on the red button to the left or the green button to the right to add Asteroids or Kuiperoids respectively To add planet or moon, go to See Inside, go to any planet or moon, duplicate it, modify the variables at the start: Semi Major Axis Semi Minor Axis Sphere of Influence Gravity Planets and Dwarf Planets (in order) - The Sun Mercury Venus Earth The Moon Mars Ceres Jupiter Io Europa Ganymede Callisto Saturn Mimas Rhea Titan Phoebe Uranus Titania Oberon Neptune Triton Pluto Charon Haumea Makemake Eris Dysnomia Orcus Vanth Quaoar Weywot Sedna
I used wikipedia's pages on the Moon's and Planets' semi-major and semi-minor axis to do the orbits. I also read on Kepler's equation on Wikipedia to do the orbital calculations How the stuff is calculated - e = Eccentricity x = x position y = y position M = mean anomaly E = eccentric anomaly a = semi-major axis b = semi-minor axis t = time G = gravitational constant m = mass of sphere of Influence Uses the Radian system M = t/2π√(aaa/Gm) e = √(1-bb/aa) M = E - e*sin(E) to solve for E, E = M for 100 times do E = M + e*sin(E) return E x = a(cos(E)-e) y = b*sin(E)
