A Galaxy Composed Almost Entirely of Dark Matter Has Been ConfirmedΒ
Β XingChao Zhang/GETTY IMAGES Astronomers have justΒ identified what appears to be a cosmic anomaly: a faint galaxy with so few visibleΒ starsΒ that, according to calculations, as much as 99.9 percent of its mass isΒ dark matter. The remaining 0.1 percent is conventional matter. This galaxy, located about 300 million light-years away, is practically invisible. Only four globular clusters, smallβ¦
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