You have embarked on a long journey to explore the depths of the universe, and you have crossed tens of thousands of light-years in the deep sky outside the solar system. You bravely dive into the vast interstellar space and witness some of the most beautiful and amazing events in the universe, from the birth of a new star system to the catastrophic death of a massive star.
Simulation of a black hole
Now you’re going to be part of a great event: you dive into a huge black hole and see what it’s like on the other side of the mysterious event horizon. Brave explorer, what will you find in it?
Close to the Monsters of the Universe
First, we need to clarify some concepts. Black holes are actually many, some large, some small, some charged, some without charge, some in rapid rotation, and some stationary. In this particular story, for the convenience of description, we set the adventure in the simplest possible scenario: a large black hole with no charge or spin. Of course, this is obviously unrealistic, but it can still be an interesting story that includes many cool physics principles. We can leave a more realistic journey to the next (assuming we can survive this hypothetical trip to the black hole…). Of course, it’s not possible).
At a distance away, the massive black hole is surprisingly mild. After all, it’s just a huge object, just like any other behemoth. Gravity is gravity, mass is mass, and the gravity of a black hole comes from a great mass. It’s like the sun, it’s the same gravity you have to it. In contrast, all black holes lack is wonderful sunlight, heat and radiation. So if you want to spin around a black hole at a safe distance, you can do it.
But since you choose to go closer to the black hole, why go around it?
The black hole itself is a curious point, a point of infinite density. But you can’t see the odd spot itself, because it’s shrouded in the event’s horizons. We usually think of the event horizon as the “surface” of a black hole, and to go further, you have to pierce this veil first.
Beyond the Event Horizon
Event vision is not a true physical boundary, it is neither a membrane nor a surface. The simple definition of event horizon is a specific distance to the odd point, and if you fall within that distance, you cannot escape. Of course, it’s no big deal.
At this particular distance, gravity is so great that nothing, even the light itself, can escape the magic of a black hole. If you fall into the event horizon and suddenly feel you’ve had enough of the black hole exploration mission, it’s too late. No matter how hard you try to launch the thrusters, you can’t keep yourself away from the odd spot. You’re already trapped, and any effort is doomed to be in vain.
Of course, your robbery number won’t come right away. Before the inevitable death, you have some time to enjoy the experience – if you can call it “enjoyment”. The time to reach the odd point depends on the mass of the black hole. For a small black hole (a mass of only a few times the mass of the sun) it may not even blink, and if it is a huge black hole that is at least a million times larger than the sun, you have a few more heartbeats to feel the mysterious corners of the universe.
You have to reach the odd point and have no choice. Within the event horizon, nothing is static. You are forced to keep moving, and the odd spot exists in the future you may have.
Outside the event horizon of a black hole, you can move anywhere in space. Up? Left? Both? Or not? It’s up to you. But wherever you go, you must always march to the future and not escape.
However, within the realm of events, this common sense is broken. At this point, the odd spot exists in your future, and you can only move all the time toward the odd spot. To the left, up, and turn around, it doesn’t matter, because the odd spot is always in front of you. Then, you’ll reach the odd spot in a limited time.
Meet with infinite
You won’t be in the dark when you fall to the odd spot. The light from the surrounding universe will fall with you and continue to fall after you. Because of extreme gravity, light migrates to higher frequencies, and the outer universe seems to accelerate as time expands.
The odd thing doesn’t stop there. Since all the mass of a black hole is concentrated at an infinitely small point, the difference in gravity is extreme. From head to toe, your body is extremely stretched, a process known as “pasta.” In addition, the middle of your torso will be squeezed. This squeeze also acts on the beam around you, allowing the incident light to concentrate on the bright band around your waist.
The oddity in your eyes can also be grotesque and distorted. It’s dark – you can’t see it because it exists in your future, just as your naked eye can’t see the future. You can’t know what it looks like until you reach the odd point. However, the odd spot does not appear as a small point, and the huge gravitational difference will cause the odd point to extend and devour most of your field of view.
As you approach the odd spot, you may land on the surface of a giant, uncharacteristic, empty black planet. When a wonder point extends completely from one horizon to another, you succeed in reaching the odd spot.
What do you find? We don’t know. If only you could tell us, but as mentioned earlier, nothing can escape a black hole, including you who have entered it.