The picture shows that on December 23, 2017, SpaceX's Falcon 9 rocket took off from Vandenberg Air Force Base in Southern California, forming a 'UFO' image.
The suspected UFO that appeared in the sky over North China last night screened the WeChat circle of friends yesterday and today. In response to this, the official Weibo and WeChat public account of the Chinese Academy of Sciences quoted meteorological knowledge today. The explanation given by the Kopuda people is: This is luminous. Cloud version of the track cloud.
According to the Voice of the Chinese Academy of Sciences, the path cloud is when an aircraft or aircraft flies over high altitude. The exhaust gas emitted by the aircraft contains a large amount of steam generated by combustion. The water vapor forms condensation. But this time it was formed at a high altitude. UFO' is not a common path cloud. Common path clouds are within the aircraft's flight range, up to no more than the stratosphere, and the altitude is within 20 km. The height of the formed track cloud is very high. Atmosphere 'middle layer', with a height of 80 to 100 kilometers, is a typical 'nocturnal cloud'. When night falls, the low level has entered the dark night, and the high altitude can also be illuminated by the sun, so when the aircraft passes the formation of a path cloud At the time, it was just illuminated by the sun, so this is the path cloud of the luminous cloud version. The luminous cloud is not common. It is only visible at high latitudes and polar regions, and is visible under the right conditions.
On December 23 last year, Spacemax’s Falcon 9 rocket from Elon Musk took off from Vandenberg Air Force Base in Southern California and carried 10 communications satellites into space. It also formed a spectacular luminous cloud in the atmosphere. It also caused the American people to exclaim that 'UFO' has come.