Facts About Time Travel by JoAnne Myers
Time travel may be theoretically possible, but is beyond our current technological capabilities, say most scientists. Time travel, is defined as moving between different points in time. It has been and probably will be a popular topic for science fiction for decades. Franchises ranging from “Star Trek” and my favorites, “Outlander” and “The time Machine” starring Rod Taylor have seen humans enter a vehicle of some sort and arrive in the past or future, ready to take on new adventures.
The reality, however, is more muddled. Not all scientists believe that time travel is possible. Some even say that traveling nearly the speed of light would be lethal.
While most people think of time as a constant, physicist Albert Einstein showed that time is an illusion; it is relative it can vary for different observers depending on your speed through space. Einstein called time the “fourth dimension,” which provides direction which only travels forward. Scientists describe space as a three-dimensional arena, which provides a traveler with length, width and height showing location.
Approaching the speed of light, a person inside a spaceship would age much slower than his twin at home. In addition, under Einstein’s theory of general relativity, gravity can bend time.
According to NASA, general relativity provides scenarios that could allow travelers to go back in time.
One possibility could be to go faster than light. (As in “beam me up Scotty”.)
Another theory would be to create “wormholes” between points in space-time. Most scientists though, believe wormholes would collapse very quickly and would only be suitable for very small particles.
Then there’s “Infinite Cylinder”, which is a mechanism where one would take matter that is 10 times the sun’s mass, and roll it into a very long but very dense cylinder.
According to the Anderson Institute, after spinning this up a few billion revolutions per minute, a spaceship following a very precise spiral around this cylinder could get itself on a “closed, time-like curve”. There are limitations with this method, however, including the fact that the cylinder needs to be infinitely long for this to work.
Another possibility would be to move a ship rapidly around a “black hole” that traveled around the speed of light, or too artificially create that condition with a huge, rotating structure.
Another theory for potential time travelers involves “cosmic strings”. Narrow tubes of energy stretched across the entire length of the universe. These thin regions, left over from the early cosmos, are predicted to contain huge amounts of mass and therefore could warp the space-time around them. Cosmic strings are either infinite or they are in loops, with no ends, scientists say. The approach of two such strings parallel to each other would bend space-time so vigorously and in such a particular configuration that might make time travel possible, in theory.
Also, it is generally understood that traveling forward or back in time would require a device a time machine to take you there.
To accomplish this, time machines are believed to need an exotic form of matter with so-called “negative energy density”. Such exotic matter has bizarre properties, including moving in the opposite direction of normal matter when pushed. Such matter could theoretically exist, but if it did, it might be present only in quantities too small for the construction of a time machine.
About JoAnne Myers:
JoAnne now lives in Texas and works at Amazon and is a part time film actress. She has two books in progress and is a cross genre author of 7 books and canvas paints. JoAnne believes in family values and following your dreams.
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