Time Portal

Even as Gene stood with his back toward the chalkboard, sweat beading on his forehead, the blue disc hovered silently if not defiantly.

It was baffling. Nothing was reappearing on the other side.

Where did everything go? They’d tossed in a pencil, alarm clock (with the alarm sounding), a handball, a basketball… All had vanished.

The calculations seemed simple enough. A 60-second time portal. Things were disappearing when you threw them in but weren’t emerging from the other side a minute later as they should. Calculations were recalculated and double checked. Everything was as it should be. What was happening here?

So now Gene rested his hand on a powerful transmitter sitting on a cart with wheels. He planned to push the cart through the portal and have them search for the signal that emitted from it 60 seconds in the future.

So the cart was wheeled forward and pushed into the portal where upon it abruptly vanished from sight.

The technicians placed on their headsets and adjusted the dials on their radios while a 60-second timer was initiated. Find the signal 60 seconds from now and they would know where things were going and why things weren’t reappearing on the other side.

What they discovered was truly astonishing, but in retrospect completely logical.

Yes, the signal was detected. Very faint and very distant but completely detectable. So where did the transmitter go?

The transmitter was in space, apparently orbiting the sun, thousands of miles away from Earth.

In the sixty seconds that the transmitter traveled into the future, Earth itself had moved away by thousands of miles.

At the equator, the rotation of Earth is about 1,037 mph (1,670 km/h), or over 17 miles a minute. Meanwhile, Earth has an orbital speed around the sun of about 67,000 mph (107,000 km/h), or about 1,100 miles per minute. The sun and the solar system orbit the center of the Milky Way Galaxy at approximately 448,000 mph (720,000 km/h) or 7,466 miles per minute.

So when the transmitter was pushed into the time portal and jumped 60 seconds into the future, the Earth spun around it’s axis 17 miles at the equator, 1,100 miles around the sun and 7,466 miles around the galactic center. Simply put, the transmitter came out sixty seconds later exactly where it went in, but Earth itself was no longer in that location.

Therefore the pencil, the ringing alarm clock, the handball, basketball and the transmitter all emerged into space, orbiting the sun over 8,000 miles behind Earth’s orbit.

It turns out the time portal was the easiest and most efficient way to send things into space.

Do you think human beings will invent a way to travel through space fast enough to reach far away galaxies or they will invent an alternate way to travel through space and time?

Wouldn’t it be great to travel at Warp speed?

The answer to your question, surprisingly enough, is not necessarily “No, humans will never invent a way to travel through space fast enough to reach far away galaxies.”

Here’s the deal. The faster you go, the slower you age, so if you could go almost the speed of light, then it would still take you millions or billions of years to fly to other galaxies from Earth’s point of view, but not so for you who are traveling in the spacecraft. For you the time would be dilated.

Look at an example introduced by Albert Einstein. Consider two twins, named Biff and Cliff. On their 20th birthday, Biff decides to get in a spaceship and take off into outer space, traveling at nearly the speed of light.

He journeys around the cosmos at this speed for about 5 years, returning to the Earth when he is 25 years old.

Cliff, on the other hand, remains on the Earth. When Biff returns, it turns out that Cliff is 95 years old.

Similarly, Biff could travel to other stars and galaxies if he could somehow go fast enough, but meanwhile whole civilizations, humanity and even Earth itself would grow old and cease to exist. So when Biff gets there, Cliff will be long gone. Biff will have traveled forward in time as his spaceship zipped through the cosmos.

Traveling fast enough will slow time down for the astronaut.

Is Time Travel Even Real?

Although I wrote a time travel novel once (Time Gods), time travel has many problems that most sci-fi authors don’t take into consideration.

For example, consider that Earth spins at the equator at about a thousand miles per hour and the Earth orbits around the sun an average speed of 29.8km/s or 65,000 mph (105,000 kph).

The sun also orbits the galactic center at about 225 km per second (140 miles per second) or about 486,000 miles per hour.

The Milky Way galaxy is moving toward the Andromeda Galaxy at about 2.1 million kilometers per hour, or 1.305 million miles per hour.

Now, get in a time machine and go forward (or backwards) an hour or so. Will you find yourself in the same place on Earth only in a different time, or will you find yourself floating in space, Earth having moved hundreds of thousands of miles away in the short period of your time travel?

Now wouldn’t that make an interesting idea for a time travel novel!

Aside from that, and disregarding the impracticality of string theory, time travel in reverse isn’t possible, but time travel to the future certainly is possible under special circumstances.

Consider that you have an identical twin and both of you are in a space ship orbiting a black hole. On your birthday, your twin sibling decides he wants to get in a shuttle craft and take a closer look at the event horizon of the black hole. So he gets inside the craft and travels near the event horizon and then comes back 20 minutes later, only to find you are a very old person and that you have aged many, many years. What you see, as your twin gets closer to the event horizon, is that he slows down until he is practically motionless. Years go by and you grow old. Your twin, down there in that shuttle, still seems frozen in time, then eventually he slowly rises up to the space craft and comes back inside. Although you are now old, you are looking at a young twin!

Another example was introduced by Albert Einstein. Consider two twins, named Biff and Cliff. On their 20th birthday, Biff decides to get in a spaceship and take off into outer space, traveling at nearly the speed of light.

He journeys around the cosmos at this speed for about 5 years, returning to the Earth when he is 25 years old.

Cliff, on the other hand, remains on the Earth. When Biff returns, it turns out that Cliff is 95 years old.

So yes, under certain conditions forward time travel is possible, but not reverse time travel, and certainly if you had a “time machine” then Earth might move away from under you while you are going 30 minutes forward or backward.

Why doesn't anyone else besides me believe in time traveling?

I don’t know the answer to your question. However, consider this. We are not standing still. In time the Earth rotates around it’s axis, the Earth also rotates around the sun, the sun rotates around the galactic center and the galaxy is merging with Andromeda.
We are therefore moving at hundreds of thousands of miles per hour in space. Fast forward 10 seconds and you will find yourself in outer-space without a spacesuit!

Is Earth mentioned in the Star Wars universe?

Everybody wants to jump on this bandwagon and throw in their two cents. Remember: Star Wars took place A long, long time ago in a galaxy far, far away.
Star Wars happened way in the past, not the future, perhaps even before the existence of Earth. Furthermore, it happened in a very distant galaxy, perhaps millions or billions of light years away.
It’s simply a modern miracle that we can watch the story unfold before us on the big screen and your Blu-Ray player! Earth is not mentioned, and if it were, the people of Earth during those days would have been primitive indeed, if even we had evolved into homo-sapiens at that point in time.

Can time travel happen, even if it's a century from now?

I have written a few answers about this topic already and this one might end up TL;DR but what the heck, Here goes.

By Chris Craddock

I originally wrote: “No. Nobody can convince you that time travel can happen because it really can’t happen. Not in the sci-fi sense everybody seems to long for.
We are all “traveling” forwards into the future at an eye popping rate of 1 second per second. We can’t go forwards any faster than that and we can’t EVER go backwards in time. Bottom line, time travel isn’t possible.
Then David Chidakel asked “I would like to hear your reasoning”. I started to answer David in the comment section but my answer got quite long, so I decided to edit my original post instead. I have written a few answers about this topic already and this one might end up TL;DR but what the heck, Here goes.
Time’s arrow…
Some physics equations seem not to care about the sign of the time variable, or in many cases not to care about time at all. If you suspend disbelief for a moment, they seem to allow for “closed time-like curves” and quantum entanglements which is geek code for “time travel”. But those are only hypothetical quantum scale effects. They probably don’t work out when considered in conjunction with other known physical laws and certainly don’t work for massive objects like people and time machines.
First of all, let’s dispose with time travel into the past… that is ruled out by thermodynamics.
First (law): just for grins and giggles let’s assume a time lord has invented a blue box that somehow instantaneously leaps the traveler back to some particular time and place in the past (relative to the traveler’s rest frame yada yada) where/when the travelers step out of the box and start interacting with the universe and alien creatures as they were back then.
But atoms/subatomic particles and their constituent energy fields are pretty tough things. They might get smashed in an accelerator or reactor, or be fused inside a star or have their electrons torn off inside a 9v battery along the way, but for the most part they are eternal and indestructible. Certainly within your own lifetime your atoms belong to you and only to you.
The problem then is that  instantly upon arrival all of the atoms making up the traveler and his/her time machine would suddenly have to exist in two places at the same time: Inside the traveler (obviously) and ALSO inside  whatever those same atoms happened to be contained within at that exact moment in the past. That can’t happen. If it could the whole edifice of physical laws would fall apart. So strike one.
Second (law): a.k.a. “entropy always wins”. The universe is made up of atoms/energy fields each more or less randomly going about its business. At any given moment we can’t even know everything there is to know (position, momentum etc) about a single atom (according to Heisenberg and half a dozen other quantum laws) -AND EVEN WORSE- a moment later even that information is lost.
So no matter how much energy you’re willing to expend, there is simply NO way to rearrange all of the particles in the universe back to some prior state. The information about that state doesn’t I have written a few answers about this topic already and this one might end up TL;DR but what the heck, Here goes.I have written a few answers about this topic already and this one might end up TL;DR but what the heck, Here goes.exist. Fried eggs can’t become fresh unbroken eggs no matter what you do. So even if you can decide “when” to go back to, there is no “there” to go back to. Strike two.
Third (admittedly just a thought experiment): While we know that time and space are entangled from a relativistic point of view, they are not the same thing. If time was just another dimension that you could (somehow) independently move along like a bead on a wire, then perhaps you could just pop out of the blue box and the universe would be sitting there exactly as it was “before”.
But whose version of “before” are we talking about? There is no universal time reference. That line of reasoning leads to grandfather paradoxes and infinite regression. If we supposed for a moment that it could happen, how could you ever tell? Aside from the violent anti-matter annihilation of the travelers atoms 🙂 I imagine the rest of the universe would simply carry on exactly the way it did last time. So logically it can’t happen. Strike three.

Now let’s think about time travel to the future. This also fails the thought experiment above.

The Future
Now let’s think about time travel to the future. This also fails the thought experiment above. In gross details if we look at (say) a tennis ball in motion right now and we know its position and velocity and mass and angular momentum and air density etc, we can predict its future position quite accurately for a short time O(seconds). Beyond that, we just can’t predict its future. What happens to the ball next week, or in a hundred years from now? How about the position and momentum of every atom in a nearby star or the couple of hundred billion of its cousins in our galaxy?
Time travel to the future isn’t possible because the future has not happened yet. Which future would be traveling to? Our blue box can’t slide the travelers time bead along the wire of the time axis because we just proved (above) that there IS no wire. And the blue box can’t rearrange the entire universe’s atoms into some as yet unseen future state because it can’t predict what that state will be, even if it had the means to rearrange them to its desired state.