The Dark Side of Star Clusters
This space photograph shows galaxy called Centaurus A (sen-TOR-us Ay). The galaxy is surrounded by thousands of globular clusters. Each of the circles in this picture shows the location of a cluster. Many of them are normal, but some of them have a dark secret — they hold lots of dark matter!
Credit:
ESO/Digitized Sky Survey. Acknowledgement: Davide de Martin
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