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- spiral arm tracer 示臂天体
- Suppose a spiral arm rotated around the center of its galaxy in about 250 million years -- as in the Milky Way. 假设一条旋臂绕其星系中心一周大约2.;5亿年，就像银河一样。
- Far out in the uncharted backwaters of the unfashionable end of the western spiral arm of the Galaxy lies a small unregarded yellow sun. 在银河系西螺旋臂的末端那片未曾标明的寂静虚空中,悬挂着一颗不被人注意的小小的黄色太阳。
- Within a thin disk, the spiral arms exhibit a pinwheel structure. 在单薄的圆盘体上，螺旋臂呈现出一个风车状结构。
- Distance of the perseus spiral arm in the Milky Way 银河系英仙臂的距离
- The 100 billion stars of this galaxy are chiefly located in two spiral arms that extend from the nucleus. 这个星系所属的1000亿颗恒星主要分布在从核心伸展出来的两条旋臂上。
- Of the unfashionable end of the western spiral arm 西螺旋臂的末端
- In looking at the Carina Nebula we are seeing the genesis of star making as it commonly occurs along the dense spiral arms of a galaxy. 通过对船底座星云的观察，我们看到了通常沿银河密集的旋臂所诞生恒星的起源。
- Younger blue stars trace the spiral arms, along with pinkish nebulae that are illuminated by new star formation. 沿着被附近年轻恒星诞生区的恒星照亮的粉红色（氢气）星云（区域），年轻的蓝巨星在旋臂上显现踪迹；
- Like ripples in a pond, the spiral arms seen in this kind of galaxy are circling waves. 像涟漪在一个池塘，螺旋武器看到在这样的星系是盘旋波。
- A bright red welt rose on his arm. 他的手臂上起了明显的条状红肿。
- Prominent spiral arms traced by dark dust lanes and blue star clusters lend this galaxy its popular name of the Southern Pinwheel. 显著的旋臂上存在着黑暗的尘埃带和蓝色星团，因此该星系也就被称为南风车星系。
- Another possibility is that large-scale spiral waves in the disk, similar to the spiral arms observed in galaxies, hasten the inflow of matter. 另一个可能性是，类似星系旋臂的大尺度螺旋波，加剧了物质的向内流动。
- Grand spiral galaxies often seem to get all the glory, flaunting their young, bright, blue star clusters in beautiful, symmetric spiral arms. 大螺旋星系似乎拥有所有的荣耀，不断炫耀他们对称旋臂中蓝色星团的年轻，明亮，及美丽。
- He hold on to my arm with a tenacious grip. 他紧紧抓住我的手臂不放。
- Astronomers think the smaller blue galaxy peeking through the spiral arms may have actually punched a hole in the larger galaxy. 天文学家认为通过螺旋臂的蓝色小银河系可能实际上在大星系中打了一个洞。
- I felt something crawling up my arm. 我感觉到有什么东西爬上我的手臂。
- One result is that M101, also called the Pinwheel Galaxy, has several extremely bright star-forming regions (called HII regions) spread across its spiral arms. 其结果之一是，M101，也被称为风车星系，其有几个极其明亮的恒星形成区域（称为HII区）分布在它的旋臂。
- The falling slate sliced into his arm. 落下来的一块石片划破了他的手臂。
- A spiral galaxy is shaped like a disk with a bulge in the center.The disk resembles a pinwheel, with bright spiral arms that coil out from the central bulge. 旋涡星系的外形像一只中心凸起的盘子，盘面类似纸风车，明亮的旋涡臂从中心的凸起盘旋而出。
