One of the two minor spiral arms of our Galaxy, according to recent studies of galactic structure. It lies between the main Scutum–Centaurus Arm and the galactic centre, about 15 000 l.y. from the local spiral arm (the Orion Arm) in which we live.
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。