Black Holes Spin Near Speed of Light

Supermassive black holes spin at speeds approaching the speed of light, new research suggests.
Nine huge galaxies were found to contain furiously whirling black holes that pump out energetic jets of gas into the surrounding environment, according to a study using data from NASA's Chandra X-ray Observatory.
"We think these monster black holes are spinning close to the limit set by Einstein's theory of relativity, which means that they can drag material around them at close to the speed of light," said Rodrigo Nemmen, the study's lead author and a visiting graduate student at Penn State University.
Einstein's theory suggests spinning black holes would make space itself rotate. The overall effect makes gas spiral in toward the black hole, and also creates a magnetic field that shoots inflowing gas back out as a jet.
read more at Space.com