S2 stream. Shreds of a primitive dwarf galaxy
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https://b2find.eudat.eu/dataset/945ebc58-ef8f-50eb-811a-84b27decb57f
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The S2 stream is a kinematically cold stream that is plunging downwards through the Galactic disc. It may be part of a hotter and more diffuse structure called the Helmi stream....
