A branch of the Paris Observatory, 4 km south of Paris, founded in 1876 by P. J. C. Janssen. It is the site of the 0.83-m Grande Lunette refractor, opened in 1895.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。