1、M31(仙女星系)是本星系群中最大的旋涡星系。
2、This mosaic of M31 merges 330 individual images taken by the Ultraviolet/Optical Telescope aboard NASA's Swift spacecraft.
3、介绍了本星系群中最大的旋涡星系M31（仙女星系）的基本观测*质。
4、例如，梅西耶天体m 1是蟹状星云，而M31是仙女座星系。
5、Between May and July of last year, Swift took 330 ultraviolet images of our closest spiral neighbor, the galaxy M31 in the constellation Andromeda.
6、By studying the star formation history and chemical evolution of M31. and comparing with the Milky Way Galaxy, we are able to understand more about the formation and evolution of spiral galaxies.
7、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。
8、天马广场是找寻仙女座星系的重要起点，仙女座星系又被天文学家们称为M31。
9、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.
10、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。
