Do even low-mass dwarf galaxies merge? New clues from the outer stars of a Milky Way satellite

Using the Subaru Telescope's wide-field camera, astronomers have discovered a previously unknown structure surrounding a tiny ...
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Observations catch galaxy cluster in the process of merging

Astronomers have used the Keck Observatory's DEIMOS multi-object spectrograph to observe a nearby galaxy cluster designated RXC J0032.1+1808. As a result, they found that the cluster undergoes a major ...