Middling black hole may be hiding in star cluster

Pulsar motion hints at extra source of strong gravity in 47 Tucanae

middling black hole

HIDDEN FIGURE  An intermediate-mass black hole about 2,200 times as heavy as the sun may lurk at the center of this dense ball of stars, a globular cluster called 47 Tucanae.

NASA, ESA, Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration, J. Mack/STScI, G. Piotto/University of Padua

Medium-weight black holes may exist after all.