The 11th-magnitude planetary nebula M97 in Ursa Major, also known as NGC 3587. It gets its name because in large apertures it shows two large dark patches like the eyes of an owl. It lies 1300 l.y. away.
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。