The newly-discovered intermediate-mass black hole, named NGC 6099 HLX-1, resides in a compact star cluster on the outskirts of the elliptical galaxy NGC 6099, about 40,000 light-years from the galaxy’s center. X-ray and infrared images of NGC 6099 HLX-1. Image credit: NASA / CXC / Inst. of Astronomy, Taiwan / Y-C Chang / ESA / STScI / HST / J. DePasquale. NGC 6099 is located about 450 million light-years away in the constellation of Hercules. Astronomers...
