Astronomers have found yet another ghostly galaxy that appears to be devoid of dark matter. Researchers have reported several such sightings over the past few years, each time flagging so-called ultradiffuse galaxies that can be as large as the Milky Way but relatively bereft of stars. This latest object, known as AGC 114905, is similar in size to our own spiral galaxy yet has 1,000 times fewer stars. If the dark-matter-free status of AGC 114905 is ever confirmed, cosmologists will be forced to reexamine and perhaps even abandon some of their most cherished theories in favor of more exotic explanations for what makes up the universe’s unseen mass.
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