Think of NGC 6397, a dazzling globular cluster, as a galactic beehive, or at least that is what this Hubble Space Telescope image makes it seem like. It’s located 8,200 light-years away in the constellation Ara and one of the closest globular clusters to Earth.
The globular cluster contains approximately 400,000 stars, and can be seen without a telescope under good conditions. NGC 6397 is just one of at least 20 globular clusters located in the Milky Way Galaxy that have undergone a core collapse. In other words, the core has contracted to a very dense stellar agglomeration. Data collected by Hubble and Gaia confirmed in 2022 that the cluster has hundreds of massive white dwarfs, but essentially no black holes.
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