solar_system = [
{ name: "Sun", symbol: "⊙", R: 0, r: 8, speed: 0, phi0: 0, moons: []},
{ name: "Mercury", symbol: "☿", R: 40*factor_size, r: 1.5, speed: -8, phi0: -120, moons: []},
{ name: "Venus", symbol: "♀", R: 70*factor_size, r: 1.5, speed: -3, phi0: -50, moons: []},
{ name: "Earth", symbol: "🜨", R: 100*factor_size, r: 4, speed: -Earth_speed, phi0: angle_90,
moons: [ { name: "Moon", symbol: "☾", R: 10*factor_size, r: 2, speed: -25, phi0: 40 },
{ name: "Sun_path", R: 100*factor_size, r: 0, speed: 0, phi0: 0} ]},
{ name: "Mars", symbol: "♂", R: 150*factor_size, r: 3, speed: -1.13, phi0: 20,
moons: [ { R: 6*factor_size, r: 0.5, speed: -200, phi0: 25 },
{ R: 10*factor_size, r: 0.5, speed: -100, phi0: 100 } ]},
{ name: "Jupiter", symbol: "♃", R: 280*factor_size, r: 1.5, speed: -0.5, phi0: 60,
moons: [ { R: 5*factor_size, r: 0.5, speed: -100, phi0: 0 },
{ R: 8*factor_size, r: 0.5, speed: -50, phi0: 15 },
{ R: 12*factor_size, r: 0.5, speed: -25, phi0: 100 },
{ R: 20*factor_size, r: 0.5, speed: -10, phi0: 300 } ]},
{ name: "Saturn", symbol: "♄", R: 380*factor_size, r: 1.5, speed: -0.2, phi0: 160,
moons: [ { R: 7*factor_size, r: 0, speed: -500, phi0: 0 },
{ R: 7.5*factor_size, r: 0, speed: -400, phi0: 0 },
{ R: 9*factor_size, r: 0, speed: -400, phi0: 0 },
{ R: 9.5*factor_size, r: 0, speed: -400, phi0: 0 },
]},
];