The 20th century was marked by the greatest discoveries in the field of physics and cosmology. The basis of these discoveries were the theories developed by a galaxy of outstanding physicists. The most famous of them is Albert Einstein, whose work largely builds modern physics. From the theories of the scientist it follows that the speed of light in a vacuum is the limiting velocity of particle motion and interaction. And the temporary paradoxes that follow from these theories are amazing: for moving objects, time flows slower relative to those at rest, and the closer to the speed of light, the more time slows down. It turns out that for an object flying at the speed of light, the time will completely stop.
This is interesting: it is another matter that it is impossible to disperse an object that has a mass to the speed of light – for this it would have to expend an infinite amount of energy.
This gives us hope that with the proper level of technology, theoretically a person is able to reach the most remote corners of the Universe during the lifetime of one generation. At the same time, the flight time in the earth’s reference system will be millions of years, whereas on a ship flying at a near-light speed, only a few days will pass … Such opportunities are impressive, and the question arises: if the physicists and engineers of the future somehow overclock the spaceship up to huge values, even theoretically up to the speed of light (although our physicist denies this possibility), will we be able to reach not only the most distant galaxies and stars but also the edges of our universe, look beyond the unknown, There are no representations?
We know that the universe was formed about 13.79 billion years ago and has been continuously expanding ever since. One could assume that its radius at the moment should be 13.79 billion light years, and the diameter, respectively, 27.58 billion light years. And that would be true if the universe expanded evenly with the speed of light – the maximum possible speed. But the obtained data tell us that the Universe expands with acceleration.
We observe that the galaxies most distant from us are moving away faster from us than the nearby galaxies – the space of our world is continuously expanding. In this case, there is a part of the universe that is moving away from us faster than the speed of light. In this case, no postulates and conclusions of the theory of relativity are not violated – in the universe, objects have sublight velocities. This part of the universe can not be seen – the speed of photons emitted by radiation sources is simply not enough to overcome the rate of expansion of space.
The calculations show that the visible part of our world has a diameter of about 93 billion light years and is called the Metagalaxy. About what is beyond this boundary and how far the universe extends, we can only guess. It is logical to assume that the edge of the universe is moving away from us most quickly and far exceeds the speed of light. And this speed is constantly increasing. It becomes obvious that if even some object will fly at the speed of light, then the edge of the universe it will never reach, because the edge of the universe will move away from it faster.
It’s interesting: it’s hard to answer what a similar trip would look like. After all, when traveling at light speed, time stops completely, and any journey to any distance for an object moving at light speed must pass in a moment. But how can an endless journey for an instant pass faster and faster away from us the edge of the universe? Probably, to answer this question we need a completely different physics …