经过了三年的简直不下，简科终于拍摄出了这组令人惊叹的星迹照片。

After three years dedicated to the project, Mr Jankovoy finally caught a series of stunning star trails.

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沃尔特·卢因通过APOD向广大天体摄影师发起挑战——拍摄一幅360度星流迹的单曝光晴朗夜空照片。

Walter Lewin, though, has asked APOD to pose this as a challenge to astrophotographers: create a real single-exposure image of a clear night sky that features 360 degree star trails.

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