The NIST has launched a new hyper-accurate atomic clock for the U.S. time standard called NIST-F2. The clock uses a 'fountain' of cesium atoms to determine the exact length of a second.
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.