[model]
name-en = "Classic Gravitation"
description-en = "Newtonian"

[examples]

  [examples.earth_surface]
  r = 6.371e6       # radius of earth
  m1 = 5.972e24     # mass of earth

  [examples.earth_moon]
  r = 385000        # radius of earth
  m1 = 5.972e24     # mass of earth
  m2 = 7.348e22     # mass of moon