Mystery of Globular Star Clusters’ Formation Deepens

New Hubble Space Telescope observations of globular star clusters in a tiny galaxy called the Fornax dwarf spheroidal galaxy (Fornax dSph) show these objects are very similar to those found in our own Milky Way Galaxy, and so must have formed in a similar way. One of the leading theories on how globular clusters form predicts that they should only be found nestled among large quantities of old stars. But these old stars, though rife in our Galaxy, are not present in the Fornax dSph, so the mystery only deepens.

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