当车轮旋转时，LED灯形成一个光弧。

As the bike wheels spin, the LEDs form an arc of light.

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宇宙中的巨型光弧是近两年来发现的一种新颖的天象。

Giant luminous arcs, the hitherto unknown types of structures in the Universe, were discovered over past two years.

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明年早些时候，卡西尼镜头将会对这段光弧和这颗小卫星做一个更近距离的观测。

Early next year, Cassini's camera will take a closer look at the arc and the moonlet.

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