U.S. Naval Observatory CCD Astrograph Catalog South (UCAC-S)Norbert Zacharias, M Germain, Theodore J Rafferty, F Stephen Gaussmag(1997)引用 23|浏览0暂无评分AI 理解论文溯源树样例生成溯源树,研究论文发展脉络Chat Paper正在生成论文摘要