#UMPlus - Globular cluster Terzan 9
This star-filled image shows the globular cluster Terzan 9, which is about 23,000 light-years from the Solar System and is located in the direction of the Sagittarius constellation. Given the very luminous nature of a globular cluster, the amount of material between us and the cluster has to be enormous, so much so that there are individual stars lying behind the dust that cannot be seen in optical light. This is because Terzan 9 is....
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