The galaxy NGC 1052-DF2 resides in a field of galaxies about sixty-five million light-years away. Its low mass, only about two hundred million solar-masses, makes it a “dwarf” and its size, about fifteen thousand light-years in diameter, places it in the regime of ultra-diffuse galaxies. It is also distinguished by hosting a large population of luminous globular clusters.
Two years ago a second, similar faint dwarf galaxy was found near it, and the relative motions of these two galaxies strongly suggest they have very little or no dark matter; for comparison, in the DOI: 10.3847/2041-8213/ac0335
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Publish date : 2021-10-11 18:26:38