I'm not exactly sure what's the end results, but you could align the cross in the circle and group them. Then you can spread the group evenly everywhere.
- Align Horizontally and Vertically the Cross and the Circle
- Group them together Object > Group or Ctrl + G
- Duplicate the group by selecting the group, holding Alt and dragging it somewhere
- Spread them evenly
You could also create a pattern with this group under Object > Pattern > Make