Distant CO clouds in third galactic quadrant

We combine optical and radio observations to trace the spiral structure in the third quadrant of the Milky Way. The optical observations consist of a large sample of young open...

本研究结合光学观测（optical observations）与射电观测（radio observations）手段，对银河系（Milky Way）第三象限的旋臂结构（spiral structure）进行追踪探测。本次光学观测包含大样本的年轻疏散（原文此处内容未完整给出）。