象银河系一样，螺旋星系由一个中间鼓起的扁圆盘和环绕在周围的螺旋形手臂组成。
Spiral galaxies, such as the Milky Way, consist of a flat disk with a bulging center and surrounding spiral arms.
这些恒星象螺旋星系中的恒星一样围绕星系中心运转，但在方向上更随机一些。
Their stars orbit the galactic center, like those in the disks of spiral galaxies, but they do so in more random directions.
一个高级数的摄影师，自己设计了这款看起来不可能的螺旋状书架，就像他的摄影技术一样厉害。
Seb Przd - a skilled photographer - has created this highly compelling set of seemingly impossible bookcases to showcase his skills as a photographer.
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