Vast ‘halo’ of dark matter found around galaxy – The Independent

A dwarf galaxy near the Milky Way has a vast halo of dark matter surrounding it, far bigger than scientists had previously thought.
The ring circling Tuscana II is as much as five times more massive than scientists had estimated, they say, and so changes our understanding of the structure of the dwarf galaxy.
But just as importantly it could re-write the story of the very first galaxies in the universe, too, since it suggests that they were spread out far further and more massive than we had realised.
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