A distant cluster of galaxies contains a hoop of the elusive dark stuff.
A ghostly ripple spotted within a cluster of galaxies 5 billion light years away supplies further evidence that the mysterious substance known as dark matter really exists.
Dark matter has a ring of truth
A distant cluster of galaxies contains a hoop of the elusive dark stuff.
A ghostly ripple spotted within a cluster of galaxies 5 billion light years away supplies further evidence that the mysterious substance known as dark matter really exists.
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