An 'X' contrail above the silvery clouds 天空的「X」原來是「飛機雲」

2 Dec 2016

Jets of air from two aeroplanes created an 'X' contrails above the silvery clouds lit by the morning sun.

Contrails are condensation trails from planes. It's normal to see one, but seldom two crossing each other in this area. Moreover,  this area is not the normal routes of planes. In the past, I only saw planes rising up from the eastern sky and head towards the west.

昨天起床無意中望出窗外，驚見如此景象！若再早些，那麼飛機噴出的白煙，在天空留下的交义應該會更清晰！一條白煙偶爾可見，但兩架飛機留下的白煙交叠甚少見，而且那部分的空域，平時不見有飛機飛過，這些方向更不是慣常飛機航道。以往所見，飛機由山嶺上「升起」，從圖左方飛向右方。