Aside from hosting some of the most massive and least-understood stars in the galaxy , Westerlund 1 is useful as an example of a relatively nearby , so easier to observe , super star cluster to help astronomers determine what occurs within extragalactic super star clusters .
Apart from hosting some of the most massive and least-understood stars in the galaxy , Westerlund 1 is useful as an example of a relatively nearby , so easier to observe , super star cluster to help astronomers find out what happens in extragalactic super star clusters .