I've put a decent amount of thought into the subject before I've come to the conclusion that reverse time travel is highly improbable, but not for the
reasons you may be thinking.
To understand this theory, you must first understand the geometry of the motion of our solar system.
Most are under the impression that our solar system moves as illustrated here.
This diagram shows a common misunderstanding of the geometry of motion in our solar system. It depicts the Earth orbiting around the sun, and the
solar system moving forward. However, this is a very incorrect depiction of how the REAL geometry of motion is portrayed.
A more realistic view of the geometry of motion would be as depicted in the next diagram.
This diagram shows the real geometry of motion of our solar system. As seen here, our Earth revolves around the sun SIMULTANEOUSLY with our sun
moving forward. This shows how the orbit of the Earth is more of a spiraling motion through space.
Back to time travel into the past.
If you are to travel through time with your entire physical being, then there are certain values that MUST be known prior to your traveling backwards
with your time machine. We are going to assume that your time machine is capable of traveling backwards in time with you, even if it weren't you will
find that it really doesn't matter in this sense.
First, you must have a time you wish to go to. That would be your first value. Not so difficult right? You go back so many years.
Then, comes the part where traveling backwards in time, seems somewhat of a complicated mess that I doubt anyone would enjoy playing with; the
location. You must have a place for you to come together in the past that isn't currently occupied by another physical structure. This means you will
most likely have to place yourself one or two feet in the air upon arrival, just for clearance from fusing your feet to the ground.
Time isn't so difficult to calculate, you can use the creation date of your time machine as zero, and go into the past by going into negative numbers,
signifying you are going backwards, or forwards with positive numbers.
Location, however, is an entire new story. Once you take into account the geometry of motion you will see where the problem lays with location as our
Earth is constantly hurtling itself through the entire universe within our solar system, within our galaxy, compared to the cosmic background it would
be nearly impossible to accurately predict where our Earth was located "X" amount of years ago.
With that said, even if you could use a very high powered and precise computer to make this calculation, how would you measure the location in space?
Considering we are constantly moving any measurement for a location in space via distance would constantly be changing. If you attempted to make a
relative measurement, for example, have the location set as the moon, you will find when you go back one year, even though the Earth and the Moon are
moving relatively the same speed, neither of them are located in the same space they were occupying when you left, you would have to put in the value
of where the moon was located that many years ago.
There may be more added to this later, but I'll let everyone skim or read over everything hear, can't wait to hear what everyone has to
edit on 10-10-2011 by Vortiki because: Fixing pictures