Science. 1964 Jul 24;145(3630):389-91. doi: 10.1126/science.145.3630.389.
The University of Illinois radio telescope has resolved the 610.5 Mcy/sec disk component of radio emission from the large galaxy M 31 into several discrete concentrations. In two cases, these correspond to the crossing of the optical major axis by spiral arms. A spur of emission extends southeast from the galaxy near the minor axis.
伊利诺伊大学的射电望远镜已经解析出来自大星系 M31 的 610.5 Mcy/sec 盘状分量的射电辐射，将其分解成几个离散的集中点。在两种情况下，这些对应于通过螺旋臂的光学主轴交叉。在星系的近minor 轴的东南方向，有一条发射线延伸出来。
