Proper Motions and Parallaxes

加州大学圣克鲁斯分校利克天文台的伯顿·琼斯博士、阿诺德·克莱莫拉博士和罗伯特·汉森博士将继续开展利克北方自然运动项目的工作。该计划第二纪元主要阶段的观测已接近完成，未来两年的重点将是板块测量和准备机器可读形式的调查。研究各类恒星的运动是理解我们银河系的基础。自行为研究太阳运动、银河系自转和速度色散以及统计确定恒星距离和光度提供了观测基础。Lick Northern自然运动计划将通过为覆盖北部三分之二天空的大约30万颗恒星提供绝对自然运动，来满足许多基本的观测需求。

Drs. Burton Jones, Arnold Klemola, and Robert Hanson at the Lick Observatory, University of California, Santa Cruz will continue work on the Lick Northern Proper Motion program. Observations for a major phase of the second epoch in this program are nearly complete, and the emphasis for the next two years will be on plate measurements and the preparation of a machine readable form of the survey. The study of the motions of various classes of stars is fundamental to an understanding of our Galaxy. Proper motions provide the observational basis for the study of solar motion, galactic rotation, and velocity dispersions, and for the statistical determination of stellar distances and luminosities. The Lick Northern Proper Motion program will meet many of these basic observational needs by providing absolute proper motions for some 300,000 stars covering the northern two-thirds of the sky.