Light Speed
The world expands with some speed that is believed to be light speed . As discussed before , the distance between Omegas changes by time and has its own formula . The distance change of the most outer Omega to the world center determines the world expansion speed. Light travels in space in all directions which has another definition . So we have two different items to be discussed , (1) the world expansion speed and (2) the light speed .
1-Expansion speed
The world expansion speed increases as distance to the world origin increases . It is zero at the origin , and is maximum at the world horizon.
2-Light speed
Light speed depends on local time slice (which increases as distance to origin ) and local distance between Omegas , and also spinning frequency which decreases as a function of distance to the world center.
These items are very similar but they change in long period of time . It is clear that the world expansion speed (specially at horizon) is defined to be light speed and time remains unchanged with it.
Clearly at any location the local light speed is the maximum speed that anything can have, but this should be treated as new term called Command Transfer Speed. This speed does not change by direction , but if something travels with this speed for a long time, then it changes by time and distance to origin .
Clearly if anything moves toward the origin with the light speed the local time increases by its position
and going back to future may happen, but that is not our future.
And if moves outward (from origin) then the local time decreases which seems that a return to back is happened, but it is not our past, indeed time is unchanged .
The worm hole is just a fictional subject to show equivalent level time stream values.
WHEN DIMS COMES UNDER CONTROL ,SPACE TRAVEL WITH LIGHT SPEED MAY BECOME POSSIBLE.
ALSO GRAVITY WOULD NOT BE A BARRIER.