Between May and July of last year, Swift took 330 ultraviolet images of our closest spiral neighbor, the galaxy M31 in the constellation Andromeda.
去年五月到七月间，雨燕卫星共为距离我们最近的星系——来自仙女座的螺旋星系m 31，拍摄了330张紫外线图像。
The nearest major spiral galaxy to the Milky Way, Andromeda, named after its constellation and also known as M31, is the largest galaxy in the Local Group of Galaxies.
仙女星系是距银河最近的巨型旋涡星系，它以其所在星座仙女座命名，同时又被称为M31，它是本星系群中最大成员。
Also known as the Andromeda Galaxy, M31 is more than 220,000 light-years across and lies 2.5 million light-years away.
M31星系也被称为仙女座星系，它跨越了220 000光年，距我们2百50万光年。
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