A massive, spacetime-warping cluster of galaxies is the setting of today’s NASA/ESA Hubble Space Telescope image. The galaxy cluster in question is Abell 209, located 2.8 billion light-years away in ...

Recent research has revealed that three well-known star clusters — the Orion Nebula Cluster, the Pleiades, and the Hyades — are linked in a cosmic family tree. Though these clusters appear distinct ...

A new Hubble image of NGC 1786 reveals stars of multiple ages in the ancient cluster, challenging previous theories and offering new clues about galaxy evolution ...