在城市附近，空气会散射出灯光的强光，产生了一种照明，将最暗的星星隐藏起来，限制了望远镜能探测到的距离。
Near cities, the air scatters the glare from lights, producing an illumination that hides the faintest stars and limits the distances that can be probed by telescopes.
小提示：在室内用现有灯光拍摄人像时，可以通过改变光源与被摄体间距离的方法使照片的光线更加动人。
Tip: When photographing people indoors by available light, move lamps closer to them or vice versa for more flattering light.
利用这段距离再开次级小洞，用于布置灯光，形成洞中洞的效果。
Some smaller holes are opened to install lightings alongside the distance and form a hole-in-hole effect.
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