... Observing . ... Behemoth black hole found in an unlikely place . ... Black hole and star orbiting at dizzying speed . ... On the other hand, the black hole orbits at т??onlyт?? 90,000 mph (150,000 km/h). т??The companion star revolves around the common center of mass at a dizzying rate, almost 20 times faster than Earth orbits the Sun,т?? said Erik Kuulkers of ESAт??s European Space Astronomy Center in Spain. т??You really wouldnт??t like to be on such a merry-go-round in this galactic fair!т?? ...