public void StarSystems_Are_Contained_In_Galaxies()
{
var g = new Galaxy();
g.Add(new StarSystem(new Star("bob")));
Assert.That(g.SystemCount, Is.EqualTo(1));
}
public StateEngine(Galaxy galaxy, IStateTicker stateTicker)
{
Galaxy = galaxy;
stateTicker.Tick += stateTicker_Tick;
}