The spheres are animated by an orbital propagator using the following parameters.

Name	Arg.Perigee	Mean Anomoly	Eccentricty	Inclination	SemiMajor Axis	RAAN	Period
Earth_Orbit	100.47	100.47	0.01671022	0.00005	1.00000011	-11.26064	1
Mars_orbit	336.04084084	355.43	0.09341233	1.85061	1.5236623	49.57854	1.881
Mercury_Orbit	77.46	252.25	0.20563069	7.00487	0.38709893	48.33167	0.240846
Venus_Orbit	131.77	181.98	0.00677323	3.39471	0.72333199	76.68069	0.615