Social media went wild as the topic "Beijing Sky" shot to No 1 on Weibo. People shared photos of a glowing streak that slowly spread into a spiral shape.
图源:观察者网
网友惊叹:太神奇了!这是什么“神力”造成的!
Many netizens were amazed: "So magical! Is this some kind of superpower?"
Meteorologists have the answer: it's a "rocket cloud", formed by rocket exhaust. These clouds form very high up, above the Earth's stratosphere. After sunset, while the lower sky turns dark, these high-altitude clouds still catch sunlight. That's why on a clear evening, they shine brightly against a dark background — making the view extra stunning.