FOR RELEASE: 9:00 a.m. PDT, June 9, 1998 . ... Reports are being presented by Dr. Patricia A. Henning and Mr. Andrew J. Rivers, of the University of New Mexico, in Albuquerque, NM, to the American Astronomical Society meeting in San Diego, California. Henning and Rivers represent two international teams of astronomers from the University of New Mexico and Australia, Mexico, the Netherlands, and Great Britain. ... The Parkes survey has uncovered 103 galaxies, only 28 of which were mapped before. ...

metrologia The leap second: its history and possible future R. A. Nelson, D. D. McCarthy , S. Malys, J. Levine, B. Guinot, H. F. Fliegel , R. L. Beard and T. R. Bartholome w Abstract. This paper reviews the theoretica l motivatio n for the leap second in the context of the historica l evolutio n of time measurement . Th e periodic insertio n of a leap second step into th e scale of Coordinate d Universal Time (UTC) necessitates frequent changes in comple x timekeepin g systems an d is currentl y th e