#Measuring the spin of a black hole
“#Measuring the spin of a black hole” An artist’s impression of a spinning black hole surrounded by an accretion disc. Astromers have use X-ray spectroscopy to measure the spin of a solar-mass black hole in the Milky Way. Credit: ESO, ESA/Hubble, M. Kornmesser A black hole, at least in our current understanding, is characterized by…