To sort out location will need:
		• Bright objects visible at large distances • Objects above or below the plane – so not as obscured • Ways to measure distances to those objects • Ways to see material other than stars – Gas, dust, ???, mass distribution • Ways to map motion of objects in our Galaxy • Examples of other Galaxies – The Shapley-Curtis debate: • Are spiral nebulae external galaxies or a type of object within our own galaxy