It's about five million times the mass of our sun, at the center of a galaxy 13 million light-years away. Scientists want to be watching when it wakes up.
A team of researchers have learned to use their thoughts to steer a flying robot around a gym, making it turn, rise, dip, and even sail through a ring.
Eleanor Imster has helped write and edit EarthSky since 1995. She was an integral part of the award-winning EarthSky radio series almost since it began until it ended in 2013. She and her husband live in Tennessee, where they enjoy guitar playing and singing. They have 2 grown sons.