“TIME TRAVEL IS IMPOSSIBLE!!!”
Lot’s of things are impossible until they aren’t.
“Time cannot pass backwards, or faster than it currently does.”
Einstein’s theory of relativity is a fundamental theory in physics that has been extensively confirmed through experimental evidence. One of the key insights of the theory is that time is not absolute and can be affected by factors such as velocity and gravity.
The theory of relativity contains two main components: special relativity and general relativity. Special relativity deals with the behavior of objects in the absence of gravity, while general relativity describes the effects of gravity on the shape of space and the flow of time.
Special relativity predicts that time will appear to pass more slowly for objects that are moving at high speeds relative to an observer who is at rest. This effect is known as time dilation, and it has been confirmed through a variety of experiments involving high-speed particles and atomic clocks.
General relativity, on the other hand, predicts that gravity can cause time to pass more slowly near massive objects such as planets, stars, and black holes. This effect, known as gravitational time dilation, has been observed through experiments involving atomic clocks on Earth and in space.
For example, in the famous Gravity Probe B experiment, scientists used four ultra-precise gyroscopes to measure the effects of Earth’s gravity on the flow of time. The experiment confirmed predictions from general relativity with incredible precision, showing that the flow of time is affected by gravity in the exact way that Einstein’s theory predicted.
Overall, the extensive experimental evidence confirms that Einstein’s theory of relativity accurately describes the behavior of time and space in a wide range of physical situations.
In addition, general relativity predicts the existence of “closed time-like curves,” which are paths through space-time that loop back on themselves, potentially allowing for time travel. However, it is important to note that these closed time-like curves are purely theoretical and have not been observed in the real world.
Einstein himself was skeptical about the possibility of time travel and believed that it would likely remain in the realm of science fiction. Nevertheless, the theoretical possibility of time travel under certain conditions is a consequence of his theory of relativity.
I’m aware of the theories of relativity, and, in case you haven’t noticed, the word ‘theory’ appears in their descriptions.
There are ‘predictions’ and experiments, but, none of those can confirm the reality of time being an actual thing in the universe, other than what we can measure as ‘time’ passes. But, time is a necessity and not an actual ‘thing’. Time is a creation of humans for measuring changes as they occur.
I’m not a physicist or astrophysicist. But, I can think and I think that, time is a human thing, and the universe doesn’t follow theories, while some of those theories remain theories because, they can’t be confirmed, other than with human experiments which yield ‘expectations’, but even then, the universe out there seems to not follow the rules in many cases, as posited by the theories.
Which came first? Mass and energy, or time? When did time get started? If there were no humans in the universe, no other life.
Still, it’s impossible to travel to the past or to the future, and the only ‘time travel’ that humans are aware of, is the time we live in as it passes.
If time travel were to be possible, it means that, the universe wound contain infinite instances of itself in history, and in the future. And to travel to those other instances would mean that, we’d have to do it to the exact position we were in and the exact composition that that instance was made of. IOW, we’d have to reset the whole universe to that exact instance with everything in its exact place, and that is why it’s IMPOSSIBLE..
Can anything from the past affect the future or the current time. We have not witnessed that. Can anything from the future affect the current instance of the universe? We haven’t experienced that either. And, if in the future we were able to travel to the past of to the current time, thew whole universe would be screwy and the laws of physics would not apply anymore. We haven’t witnessed such interruptions our immediate environments or out there in the universe. Predictions would not have been able to be made in a ‘screwy’ universe.