Recently, under the clear night sky, people in many areas saw a very surprising phenomenon. They saw a large, bright object slipping through the air and emitting a very dazzling light. The people who witnessed this phenomenon were distributed in a wide range. For example, people in Hebei, Shanxi, Shandong and other places took photos of related images and uploaded them to the Internet, which aroused heated discussions among everyone.
" UFO "
From related videos and images, we can see these "UFOs" that are witnessed by people mainly have the following characteristics: First, the movement speed is very fast. If you don't just look up to observe the sky, you may have missed the sighting moment;
2 is dragging a longer tail, the shape is a bit like the comet we saw, but the volume and scale are much different;
3 is a dazzling light, and the UFOs seen this time emitted a bright green light;
44 may make a loud noise at the same time.
Someone commented online that it was a spacecraft driven by an alien advanced alien living organism to the earth. If this statement was placed in the 1980s and 1990s, I think it would definitely attract more attention and attract more people's interest and attention. However, over the past few decades, there have been too many such luminous objects in the Earth's atmosphere. Every time such a phenomenon occurs, some people have classified it as "alien", but in fact, as of now, scientists have no definite evidence to confirm the existence of aliens, so it is becoming increasingly far-fetched to connect these phenomena with aliens.
Experts explain that it is likely that Fire Meteor
So, what is this "UFO" that has been witnessed by people in many places? Relevant media interviewed famous astronomers in our country. After research and judgment, experts said that it is very likely that the phenomenon of "fire meteor" has appeared.
Everyone should be very familiar with meteors. Outside the Earth's atmosphere, there are a lot of interstellar dust and rocks. They usually revolve around the sun at a certain revolution speed like the earth. However, because these objects are small in mass, they are easily disturbed by external factors, such as gravitational disturbances or impacts, changing their operating speed and direction. When they change direction and drive towards the earth, they are affected by the gravity of the earth, and there will be a certain chance to "rush" towards the earth and enter the atmosphere. Under the violent friction with atmospheric molecules, a very bright light is drawn in the sky, thus forming a meteor.
. Fire meteor is a type of meteor. From a classification perspective, meteors can be divided into single meteor, fire meteor and meteor shower . Fire meteor is a larger mass individual in the "meteor" camp. After entering the Earth's atmosphere, the friction with atmospheric molecules is higher, so the brightness is higher. Meteors with brightness of more than -3 and with a fireball-like appearance are generally called Fire meteors.
Because of its large size, many fire meteors can generally "stand" to the bottom of the atmosphere or hit the ground to form meteorite . Under the strong light, fire meteors may also appear during the day. Some fire meteors can hear "rustling" sounds on the ground due to their violent "burning", and even such fire meteors will disintegrate and explode in the air, which is very spectacular.
What kind of meteor will become a fire meteor
In addition to the condition that the mass was large just mentioned, fire meteor can stand out from the meteor camp, which is that the initial speed when entering the earth's atmosphere cannot be too fast. If the initial speed is very fast, then it will basically burn out when passing through the upper part of the atmosphere, and we will not see anything on the ground.
Therefore, the probability that those meteors with low initial velocity entering the atmosphere will eventually become fire meteors and are observed by our naked eyes is high.Generally speaking, for the northern hemisphere, around the vernal equinox every year, the velocity of most meteors entering the atmosphere is the same as the movement speed of the earth. At this time, the velocity of both will basically offset a large part of it, so the initial velocity is relatively low, and the probability of fire meteors appearing during this period is high.
At present, many places in the northern hemisphere have entered autumn and winter. At this time, the probability of being able to observe fire meteors is actually very low. Those who observe fire meteors can be said to have "winned a big prize"!
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