Star Swarms Reveal a Hidden Beast: NASA’s Hubble Hunts for Black Hole Close to Earth

Globular Cluster Messier 4 (M4)

A Dark Central Mass is Lurking at the Hub of a Glittering Stellar Island Gravitational traps in space, black holes, come in different sizes. Or...

from SciTechDaily https://ift.tt/UrW47eK

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