Hubble Uncovers Concentration of Small Black Holes

Astronomers on the hunt for an intermediate-mass black hole at the heart of the globular cluster NGC 6397, found something they weren’t expecting: a concentration of smaller black holes lurking there instead of one massive black hole. Read more: For more information, visit Video credit: NASA's Goddard Space Flight Center Paul Morris: Lead Producer Music: “Glass Ships“ by Chris Constantinou [PRS] and Paul Frazer [PRS] via Killer Tracks [BMI] and Universal Production Music. Visual Credits: Artist’s Impression of the Black Hole Concentration in NGC 6397 Video credit: ESA/Hubble, N. Bartmann Callout of the Black Hole Concentration in NGC 6397 Video credit: ESA/Hubble, N. Bartmann Artist Rendition of Gaia Spacecraft Image credit: ESA, C. Carreau This video can be shared and downloaded at While the video in its entirety can be shared without permission,