At this very moment you are traveling through time and space. Even if you are sitting or lying down doing absolutely nothing but reading this, you are a currently moving object in space. Earth is spinning on its axis. The Earth is orbiting our Sun. Our Sun is orbiting the center of our galaxy. Our galaxy is moving through our visible universe. Our visible universe is moving inside a marble with which a giant alien child is playing. Probably.
You are also moving through time. You are speeding along at a rate of 60 seconds every 60 seconds. Welcome to the future! (Re-read that sentence over and over and it will still be true.) But traveling into the future at a pace equal to the pace at which time progresses when unaltered is hardly the exciting journey we expected. But it kind of is. At the smallest measure of time, your past, present, and future are all happening at once. Expand this outward and you have your journey through time. The events in the past affect both the outcomes of your present and your future. The events in your present affect both the outcomes of your past and your future. And, a little harder to grasp, the events of your future affect both the outcomes of your present and of your past.
For example, you are going to buy a 2015 Ford Taurus in the future. Sorry, but you are not buying the hover model. At our present, that is the future. At the present time you are buying the car, you having bought the car is the future. At the present time you have bought the car, you buying the car is in the past and owning the car is the future. At the present time you are owning the car, you having bought the car and buying the car are both in the past. Yet, at the smallest measurement of time, all three of those events happened at once. You are currently in the past, the present, and the future at one moment and that is time travel.
But, once again, that isn't that exciting. And neither is the next form of time travel because your brain is too slow. Your eyes are lying to you. Light, traveling at the speed of light, allows your eyes to receive images. The receptors receiving those images, relaying the signal through nerves to your brain, and your brain decoding those signals into something you are able to understand is a very fast process. But is isn't anywhere near as fast as the speed of light. What your eyes, and the rest of your senses for that matter, are telling your brain to perceive as the present is actually the past. And it has been for some time now. You are living in the future, perceiving it as the present, but it is actually the past. How fun is that?
However, if you were able to run faster than the speed of light, you could beat yourself in a foot race. You would be able to cross the finish line and turn around to see yourself leave the starting line. You could do this because the light absorbing you at the starting line hasn't caught up to the light absorbing you at the finish line. For example, if there are aliens in the Alpha Centauri solar system 4 light years away, and they had a powerful enough telescope to view the events on Earth, they would be viewing events that happened four years ago as they unfolded. The light now reaching their eyes, traveling at the speed of light, has taken four years to get there. But they would see it in real time as every second passed. If you held up a sign for them to see right now, they would see it in four years. This is because of Relativity. Time is relative to the observer. What is the present for them is actually the past, as well as the future, for us.
Think about it: 70 light years away, someone may be watching battles of World War II being fought in real time. 2000 light years away, someone may be watching Jesus perform miracles in the streets of Jerusalem. 65 million light years away, someone may watching the dinosaurs die. All right now in real time. Our present's past is our future's present is our past's future. Because time is relative.
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