Recently, in the sky of the central region of the United States, a large burning fireball suddenly appeared, and many people at the scene also witnessed this scene.
Speaking of which, it is not uncommon for "unidentified objects" to appear in the sky of the United States, after all, the United States is the country with the most UFO sightings on the earth, so what will be the "big fireball" that appears this time?
<h1 class="pgc-h-arrow-right" data-track="3" > alien visitor? A large fireball appeared in the sky of the middle of the United States</h1>
Generally speaking, when meteorites fall into the atmosphere, it is easy to appear similar large fireballs, which also have a unified name - fire meteors.
For example, on December 23 last year, a large fireball appeared in the night sky of Yushu, Qinghai, China, and at that time, some people suspected that the UFO of aliens crashed, but later investigations confirmed that it was a fire meteor that fell into the earth.
On Earth, the frequency of fire meteors is not low, and because the brightness of fire meteors is very high, many times even in the daytime, it can be seen, so, at the beginning, when this large fireball appeared in the sky in the middle of the United States, researchers first guessed that the fire meteor crossed the sky.
However, in the subsequent investigation, it was found that the truth of the matter was not so simple. Because this time across the sky in the middle of the United States, and the big fireball that burns fiercely, is not a fire meteor, nor an alien aircraft, but a 100% man-made object.
<h1 class="pgc-h-arrow-right" data-track="21" > so what is this artificial object that crosses the sky in the middle of the United States? </h1>
After the "unknown object" crossed the sky, the American AMS (Meteor Association) has received more than 80 reports of sightings, from the southern state of Tennessee to the northern state of Michigan, many people are curious about what this large fireball that crossed the sky is.
In the end, astronomers from Harvard University in the United States gave the final answer, it turned out that the large fireball that crossed the night sky in the middle of the United States turned out to be a Russian reconnaissance satellite, but it malfunctioned after launch, resulting in it not entering the predetermined orbit and crashing directly into the atmosphere.
According to the data, the Russian reconnaissance satellite Kosmos-2551, which was first launched on September 9 this year, weighed about 500 kilograms, and although the large fireball streaked across the night sky in the middle of the United States, no debris fell to the ground, because it had completely burned up at high altitude.
But even so, U.S. researchers are still worried because they believe that today's human "satellite fever" may cause more and more failed satellites to fall into the earth's atmosphere, and may even pose a threat to life on earth.
And this is not the first time that a Russian satellite has become a large fireball in the night sky of the earth, as early as last year, a Russian military satellite also crashed, when many parts of Australia, there were also large fireballs in the night sky, which was initially considered to be a "fire meteor", but later proved to be related to Russia's failed satellite.
<h1 class="pgc-h-arrow-right" data-track="22" > so will the satellites around the earth threaten humans? </h1>
Speaking of which, American researchers should worry most about not the crash of satellites from other countries, but the need to worry about their own satellites, especially after the large-scale satellites of Musk and Amazon companies are in the sky, at least 15,000 artificial satellites will be added around the earth, and this may be the most important impact on human beings.
Take Musk's "star chain", since the first batch of satellites in 2019, in the night sky, it is often possible to see the "small train" composed of "star chain" satellites, this is because these satellites are low-altitude flight, and to form a network distribution around the earth, so that not only will pollute the earth's original night sky, but also lead to astronomers observing space Line of sight is also blocked.
Because once there are too many artificial satellites around the earth, then, in the process of space observation, in order to achieve not to be obscured, it is necessary to constantly adjust the angle, at the same time, because some angles of the line of sight has been blocked, so that if there is an asteroid flying towards the earth, or there is an important astronomical phenomenon in the universe, we are also easy to miss, which may put the earth in danger.
In addition, not all satellites, after falling into the atmosphere, will be burned immediately, will not fall on the ground at all, in the process of these satellites falling at high speed, once they fall on the ground, then, the power will be quite amazing, especially now with the development of science and technology, many satellite power sources, are also with a certain degree of radioactivity, natural, once it falls in the densely populated area, naturally it will naturally cause a great impact.
Therefore, there will be many researchers who are strongly opposed to unnecessary satellite launches, and protest against Musk's "Starlink Plan", believing that so many satellites should not be launched.