According to news on January 11, according to media reports, at about 18:00 on January 10, many citizens in Zhangjiakou, Hebei Province photographed unidentified flying objects.Dragging its light tail, it rises rapidly like a coiled silver snake.Citizens in Yinchuan, Baotou, and Datong also took photos of the same strange celestial phenomena. In response, staff from the Zhangjiakou Emergency Management Bureau said,The scene has been noticed, but no notification of the abnormality has been received. It may be a rocket launch.
It is understood that after a rocket is launched, a contrail cloud will be left in the sky. The high-temperature exhaust gas released after the rocket propellant is burned mixes with the cold air in the high altitude, causing water vapor to condense to form a contrail cloud.
This kind of cloud band is usually white or off-white and appears in the flight path of the rocket. At high altitudes, the wake cloud may stretch or disperse with the influence of wind, forming a unique shape.
When launched in the evening or early morning, the rocket's wake will appear like a "fish" when illuminated by high-altitude sunlight. This is because the wake is illuminated by sunlight and the surrounding sky is dark, resulting in a strong visual contrast.