public StellarHistoryEvent(StellarEventInvoker init, double year, string eventStr)
 {
     this.eventInit = init;
     this.yearDate = year;
     this.eventText = eventStr;
 }
 private void AddFullEvent(StellarEventInvoker si, double year, string eventInfo)
 {
     this.ourEvents.Add(new StellarHistoryEvent(si, year, eventInfo));
 }