Evidence of Light Pollution: Halos of Light Spilling into the Sky

Night view of a distant city from a suburban hill. The city itself is just a low band of lights on the horizon, but the sky above it is stained by a large, upward-diffusing dome of orange-brown artificial light. The brightness gradually diminishes from the horizon upwards, only returning to deep blue near the zenith. This light halo washes out almost all the stars that should be visible, leaving only a few of the brightest points barely penetrating. The ridges and trees in the foreground appear as dark silhouettes, forming a strong contrast with the polluted sky. Moisture in the air makes the edges of the light halo more diffuse and blurry. Avoid: drawing the sky as clean deep blue, making stars clearly visible, depicting the city as a distinct cluster of buildings, eliminating the light halo's gradient.

Translated from Chinese by AI.

從郊區山丘望向遠處城市的夜景,城市本體在地平線上只是一條低矮的燈帶,但其上方的天空被大量向上溢散的人工光染成一大片橘褐色的光穹,亮度由地平線往上逐漸減弱,在天頂附近才回復深藍。這片光暈把原本應該可見的星星幾乎全部洗掉,只剩下少數最亮的星點勉強穿透。前景的山稜與樹木呈現深黑的剪影,與被污染的天空形成強烈對比。空氣中的濕氣讓光暈邊緣更加擴散模糊。避免:把天空畫成乾淨的深藍、讓星星清晰可見、把城市畫成明確的建築群、消除光暈的漸層。