I understand that this question has recently been asked, and yet not answered to the greatest and most understandable extent, but I was wondering whether travelling at the speed of light is really the most EFFICIENT speed at which to travel when going from any given point (A) to another point (B) in space.
Example: I want to travel from one planet (point A) to another (point B) in space as quickly as possible, thus taking the least time. Now, according to Einstein's theory of special relativity, if I were to travel, say, 270,000 kms-1 (km/s), my relativistic change factor would be 2.3, meaning every year I spend on the ship, while travelling at this speed, would be 2.3 years for a bystander on the planet that I am travelling to (point B). While I am travelling VERY fast at this speed, the time it takes me to reach point B will be perceived by the bystander on that planet as longer than I perceive, as time for me whilst on the ship has slowed down. Now if I were to travel at a slower speed, say 230,000 kms-1, my relativistic change factor would be only 1.3, substantially less.
In conclusion, I am curious as to whether travelling FASTER will benefit when someone wants to travel from point A to B, meeting a bystander at Point B.
Now so that no one is confused, the time the space shuttle leaves point A, and then arrives at Point B to meet the bystander, is how long the trip takes, meaning that is is in the bystanders perception of the length of time taken and not the person in the shuttle.
Is there a way of calculating, i.e a formula of some sort, this theory.