New infrared images of the Milky Way show just two major spiral arms, Scutum-Centaus and Perseus, along with a newly discovered arm called Far 3kpc Arm.
左边是银河系的目前结构，显示其两条主螺旋臂，右边是较早的银河系图像，有四条主螺旋臂。
In a dark country sky, you can see that Cygnus is flying along the starlit trail of the summer Milky Way.
在旷野的夜空里，你可以看到天鹅座正沿着夏季银河的星光径飞过。
In a dark country sky, you can see that Cygnus is flying along the starlit trail of the summer Milky Way.
在旷野的夜空里，你可以看到天鹅座正沿着夏季银河的星光径飞过。
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