The brightest central part of the Lagoon Nebula in Sagittarius, shaped like a figure-of-eight, near the 6th-magnitude star 9 Sagittarii.
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。