Perseus spiral arm的意思|示意

Located about 6, 000 light-years from Earth, the Heart and Soul nebulae form a vast star-forming complex that makes up part of the Perseus spiral arm of our Milky Way galaxy.

心与灵星云离地球有大约6千光年的距离，形成一个其大无比的星辰制造场，构成了我们银河系英仙座螺旋星云的部分螺旋腕。

New infrared images of the Milky Way show just two major spiral arms, Scutum-Centaus and Perseus, along with a newly discovered arm called Far 3kpc Arm.

左边是银河系的目前结构，显示其两条主螺旋臂，右边是较早的银河系图像，有四条主螺旋臂。