Hubble Deep field images can peer deep into the universe, and that's exactly what its doing in this image of NGC 6752. Located 13,000 away in the southern constellation of Pavo. For a 10 billion year old cluster with hundreds of thousands of stars, it has a lot of blue stars, especially in its core. These blue stars are too young to have been formed with the rest of the cluster, so its thought that they were formed by the collision of two or more red stars, as multistar systems are extremely common in this cluster.
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