The trajectory of light in the universe is an arc. If conditions allow it to propagate all the time (if it is not absorbed or attracted), its final trajectory in the universe is a circle. Light can be attracted by black holes, and light will be attracted by mass matter when it meets mass matter, indicating that matter with minimal mass (minimal means that the mass at rest is zero) will be attracted. So if we are ready to escape now, as you said, we must not run with our legs, but only with the help of high-speed spacecraft. No matter how advanced a spaceship is, it is always heavier than a photon. Then, when the speed is getting closer to the speed of light, according to the theory of relativity, the mass of the spacecraft is as big as a black hole, just like the synchrotron used by the famous California Institute of Technology, in order to deflect high-speed electrons, the required magnetic field strength is 2000 times larger than that predicted by Newton's law at low speed. In other words, the electron mass in the synchrotron is 2000 times the normal mass. In this way, the situation of the imaginary spaceship is much more complicated than the situation of the first cosmic speed and the second cosmic speed you said. Can you imagine that such a massive object can escape so easily in the universe?

I don't know if you are in high school, it's very valuable to have such an idea. Your thinking method is actually the scientific reasoning thought of Galileo's sports experiment, that is, the illusion experiment of which ball will keep moving. However, there are many things to consider in shortening. You compare the final cosmic speed from the characteristics of the first cosmic speed and the second cosmic speed. One problem with this idea is that the velocities of the first and second universes are too small to be used as a general velocity to discuss the final cosmic velocity. Just like mathematical induction, when n is small, the condition holds, and when n is large, it needs to be proved that the condition does not hold.

I don't know if you can understand what I said. I hope you can keep this thinking to study physics. In addition, don't just listen to others, think for yourself. The problem that particles travel faster than the speed of light is a profound problem. First of all, we must find out what the speed of light is. For example, the influence of light's refractive index in air is easier to be slower than that of some high-speed particles, while in air, light is definitely slower than gamma rays. In fact, it is a conceptual problem that particles are faster than light. I always believe that the speed of light is the upper limit of the physical universe. We should continue to pay attention to the theory that some scholars assume that there is a negative universe and the lower speed limit of the negative universe is the speed of light, but there is no evidence to prove this conjecture.

Superluminal particle: Also known as superluminal particle, it is a hypothetical subatomic particle with negative mass, and its speed always exceeds the speed of light. So far, the existence of superluminal particles has not been confirmed by experiments.

The tachyon is just a hypothesis, which should be related to the symmetry and physical properties of physical laws. The upper limit of speed is the speed of light, which can be said to be absolute at present. Of course, if you have studied philosophy, you should understand that any truth is relative. Only in a specific time and place is it true. The specific time here refers to the present, and the specific place is the universe. Maybe you will find what I said a little opportunistic and ambiguous. However, after you know more, you will know more about people and the influence of experimental methods on physical entities. You will be shocked to find that we use that means to understand objective things and that experimental method to study objective entities, and the results are different. It seems that I said such ridiculous things. I said, "I close my eyes, the world doesn't exist, but I open my eyes and the world exists for me." How ridiculous, but sometimes you don't believe it. Maybe one day you will finally find that the world really has an unimaginable relationship with our human understanding, and you will find how special we are, so don't underestimate this particularity of people. Just like scientists today would rather believe that the universe is expanding than accept that the earth is the center of the universe. This is because too many people think that human existence is accidental. Indeed, after a little study of the living conditions, everyone is willing to believe that this is an accident. But no scholars have produced evidence to prove that human existence is accidental, which is taken for granted. If man's existence is the necessity of the universe, then truth must be related to man's understanding.

Therefore, the progress of human understanding determines the development direction of the universe.

I suddenly told you so much at sixes and sevens that you can look at some of your ideas dialectically and critically.