When the first photograph of a black hole was taken, a term known as the event horizon became famous . It's the last shadow before a deep blackness that is capable of swallowing all light and preventing it from escaping. Many people wonder what this means.
Therefore, we are going to dedicate this article to tell you all the characteristics, origin and importance of the event horizon.
What is the event horizon
It's important to emphasize that black holes are capable of trapping all matter and even spacetime itself within them. They can not only trap light, but their immense gravity can exacerbate everything we've mentioned. Black holes themselves are completely black and featureless. Until now, they have only been detected due to the immense effects they produce in their surroundings. They have also been detected because of the enormous energy they release.
This is why the first contact with a black hole was made possible by the use of a network of radioscopes. These radioscopes can measure radiation coming from space. They don't point out the universe to us in the same way a telescope would. Radioscopes have been used to detect two specific black holes . One is the supermassive black hole at the center of our galaxy, which has been extensively studied . The other is located in the nucleus of the galaxy M87.
Thanks to modern computer programs, we can translate the data provided by radio telescopes into images. It is thanks to this that the first photograph of a black hole was taken. For more information on this topic, you can consult the discovery of the largest black hole.
Point of no return
It's important to remember that you can't see anything inside a black hole. We can only see the imprint of the energy released by the swirling gas around it. This gas is superheated and emits a large amount of radiation. The radiation can penetrate the dust clouds that surround all black holes. The shadow we can observe gives us some information about how spacetime is warped in the immediate vicinity of the black hole.
Right after all this part is the event horizon. It should be noted again that you cannot expect to see any lights or fringes that can be pointed out. And it is that this event horizon is an imaginary border. If we could cross the event horizon we would not notice any type of change. This is because it is not a natural surface, but the point of no return of the hole. This point means that, from there, there is only one possibility: that we continue to fall into the hole without the possibility of turning back.
The immense gravitational force of black holes attracts everything within them. Such is their mass and density that they exert a colossal pressure. If you want to explore more about what happens when a black hole reaches its full potential, you can visit this article: What happens when a black hole ... You can also read about interesting facts about the black hole at the center of our galaxy.
Theoretical explanation of the event horizon
Let's take a slightly more theoretical approach to try and visualize the characteristics and essence of the event horizon. It's important to understand that the event horizon of a black hole is linked to the escape velocity of the object. This is the speed at which a hypothetical person would fall into the black hole. This speed would have to overcome the black hole's gravitational pull. The closer someone gets to the black hole, the greater the speed they would need to escape its massive gravitational force.
The event horizon can be described as the boundary around a black hole where escape velocity exceeds the speed of light. To this day, we have not found anything that travels faster than the speed of light. This is explained in Einstein 's theory of special relativity . Since, in theory, nothing can travel faster than light, the event horizon of a black hole is essentially the point from which nothing and no one can return. The name refers to the impossibility of witnessing any event that takes place within that boundary, the horizon beyond which one cannot see.
Let's suppose there's a hypothetical traveler who crosses the event horizon. From this point, the theory states that the entire mass of the object collapses into an infinitely dense expanse. This means that the fabric of space and time as we know it is completely warped. It has been curved to an infinite degree. Inside this black hole, beyond the event horizon, the laws of physics as we know them according to Einstein's theory no longer apply.
full discovery
Scientists have been able to photograph something that was never thought to exist. Until recently, black holes were thought to be merely theoretical, used to explain certain patterns in the universe. However, thanks to current technology, we can now take the first photograph of a black hole.
It is a fact that this has represented a major advance for the world of science. It's important to keep in mind that numerous textbooks related to the universe will have to be rewritten. The vast amount of information we have today, compared to the past, means we must constantly update our knowledge.
The black hole at the center of our galaxy is known to be capable of absorbing everything in its path. Not even light can return from the event horizon. Absolutely everything that crosses this horizon ends up being distorted, just as spacetime itself is. It's curious that there exists a place in the known universe where the laws of physics as we know them cannot be applied, since they simply don't exist.