private void buttonSearch_Click(object sender, EventArgs e)
{
double MaxLy = Double.Parse(comboBoxMaxLy.SelectedItem.ToString());
IDiscoveryController edfrm = this.Owner as IDiscoveryController;
HistoryEntry hi = edfrm.history.First <HistoryEntry>();
List <ISystem> distlist;
distlist = SystemClass.GetSystemDistancesFrom(hi.System.x, hi.System.y, hi.System.z, 1000, MaxLy);
}