private void ShowSelectedItemInfo(object sender, RoutedEventArgs e)
{
if (ListView.SelectedItem == null)
{
return;
}
SpaceObject oldObj = ListView.SelectedItem as SpaceObject;
SpaceObject newObj = oldObj.GetCopy();
OpenInfoWindow(newObj, delegate() {
_universe.Remove(oldObj);
_universe.Add(newObj);
sky.ItemsSource = _universe;
});
}