Circinus:a constellation in the Southern Hemisphere near Musca and Triangulum australe.
圆规星：座位于南半球在苍蝇座和南三角座附近的一个星座。
By the way, there's a second galaxy - M33, in the constellation Triangulum - that some experienced observers have glimpsed with the unaided eye, under perfect sky conditions.
顺便说一下，还有第二个星系- M 33，位于三角座-是一些有经验的观察者在完美的天空状况下用肉眼捕捉到的。仙女座据我们2.2百万光年。
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