The cluster is estimated to be about 12 billion years old.
image, called Pismis 26, takes its name from astronomer Paris Pismis, who discovered the collection of stars at the Tonantzintla Observatory in Mexico in 1959. The stars in Pismis 26 take on a nearly spherical structure. The cluster appears to contain predominantly red stars, with a smattering of brighter blue stars along the edges.
The cluster is also heavily metallic, meaning that its stars contain higher levels of elements that are heavier than hydrogen and helium than stars like the
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