Simulate the planet system using N-body too

[tatjam]

This is the technique used by Principia, it gives more accurate solar system evolution and should be faster

[tatjam]

Legacy solar system, just in case we decide to roll back so the NASA data is already there:

[star]
	name = "Sun"
	mass = 1.98847e30
	radius = 695_508_000.0

[[element]]
	name = "Earth-Moon"
	is_barycenter = true

	is_nasa_data = true
	smajor_axis = 149598290450.51898
	smajor_axis_var = -0.00000003
	eccentricity = 0.01671123
	eccentricity_var = -0.00003661
	inclination = 0.0
	inclination_var = -0.01337178
	mean_longitude = 100.46457166
	mean_longitude_var = 35999.37306329
	periapsis_longitude = 102.93768193
	periapsis_longitude_var = 0.31795260
	asc_node_longitude = 0.0
	asc_node_longitude_var = -0.24123856


[[element]]
	name = "Earth"
	parent = "Earth-Moon"
	config = "planets/earth/config.toml"

	is_primary = true
	
	rotation_period = 23.9344696
	rotation_at_epoch = 800.0
	north_pole_declination = 90.0
	north_pole_right_ascension = 0.0

[[element]]
	name = "Moon"
	parent = "Earth-Moon"
	config = "planets/moon/config.toml"

	smajor_axis = 384308437.7707066
	eccentricity = 0.0549
	inclination = 5.145
	periapsis_argument = 318.15
	asc_node_longitude = 125.08
	mean_at_epoch = 135.27

	rotation_period = 655.719864
	rotation_at_epoch = 135.0
	north_pole_declination = 65.64
	north_pole_right_ascension = 266.86

[[building]]
	body = "Earth"
	building = "buildings/launchpad.toml"
	name = "Space Center"
	[building.pos]
		x = 6360_000.0
		y = 0.0
		z = 0.0 
	[building.rot]
		x = 0.0
		y = 0.0
		z = 0.0
		w = 1.0

[tatjam]

The systems are now propagated using whatever propagator is used.