orion arm

基本解释

The only data point available for such multi-billion-year-old stars is a particular yellow dwarf in the Orion arm of the Milky Way.
对于这些星龄在数十亿年以上的老恒星来说，唯一的数据点就是银河系中猎户座旋臂上的那颗黄矮星。
The complex is called the Vela Molecular Cloud Ridge, and may form part of the edge of the Orion spiral arm spur in the Milky Way galaxy.
这片复合区域被称为船帆分子云脊（Vela Molecular Cloud Ridge），它可能参与形成了猎户座悬臂的边缘部分。
Plant rows were placed to represent arms of our Galaxy, including the Sun's Orion Arm, the impressiveSagittarius Arm, and the little discussed Norma Arm.
一行行植物就像我们所在星系的星臂那样排列着，包括太阳所在的猎户臂、令人惊叹的人马臂，以及甚少谈及的 Norma 臂。