Scientists are perplexed by the fact that our Milky Way galaxy is traveling significantly faster than the two adjacent galaxies. Under the Big Bang Theory, all matter should be traveling away from the initial core at the same velocity. However, there is something at work that makes our galaxy behave differently. Some call the unknown mechanism "the Great Attractor," pulling us faster than our neighbors.
Some speculate that it may be a concentration of dark matter or dark energy that is the force that is moving galaxies around like ping pong balls in a steady breeze. Others think it may have to do with gravitational pulls from unknown objects or forces that create gravity itself.
If we know that our system is traveling faster in space, thence faster in space-time, than another galaxy, that would mean that travel in space (and the time to travel in space) is not universally linear.
It is one of those wordy math problems about two trains leaving the station at the same time, but traveling at different speeds but having different stops. Which trains arrives at the end station first?
But this has a place in LOST lore. Daniel's time-rocket experiments from the freighter to the island showed that the island was moving away from the ship. Which was a problem for a stationary island. If island time, and Daniel observed the light being "different," was moving at a different rate than the rest of Earth, we have the same problem as scientists have with the Milky Way issue.
The localized time difference led to theories about the island being an anomaly. It was either a space-time portal, or on event horizon of a stable micro-black hole. It was also thought as an interdimensional bridge between universes.
If there are parallel universes, what type of matter would be between its layers? Is this the area where dark matter resides? Does the parallel universes masses have gravitational pulls through the separation zones into our own universe (thus explaining the speed differences between galaxies)?
If you look at Earth itself, its crust sits mostly stationary on the surface while tectonic plates are moved about through the pressure and movement of the hot magma at the planet's core. If our universe sits on the crust of known space, the parallel universe's forces could be equated with the subsurface geologic properties which have a direct effect on the surface plates.
If the Milky Way is traveling at 2.2 million km/hour in space, why do we feel time is a slow 60 minutes in an hour? Our perception of time comes from the solar cycle of the sun around our planet. We do not feel or sense that we are moving at speeds 2,500 times faster than a jet airliner because everything around us is traveling at the same relative speed. We only become aware of the differences in relative speed when something is slower or faster than our current position. When one is jogging at 1 mile/10 minutes and a bird flies by and zooms off into the distance, we know that the bird is traveling faster than we are at that moment. But if we are traveling 55 mph in a car and we overtake a bird flying down the road, we know that we are traveling faster than that creature.
The same must hold true in space. The Milky Way is the car and the neighboring galaxies are the birds being left behind in our wake.
But this opens up a practical question. If our galaxy is moving away faster from adjoining galaxies, would it not take more force, effort and time to move against the forces that is driving us a part? It would be swimming against a strong current.
If Einstein was correct and the speed of light is the fastest anything can go in space, would someone traveling to our galaxy make it quicker to us then us trying to travel to them?
And when would arrive at a place that is traveling slower in space time, would we have aged slower or become younger? It is an odd tangent that space travel could be the real "Fountain of Youth." Aging is a measure of the passage of time. But what happens when one reverses the process of time in the aging process? Do you become immortal? Is it like Eloise Hawking - - - or Bill Murray in Groundhog Day - - - being alive long enough to know everything?
But as NASA scientists have said, any trips to Mars would essentially be one-way missions. The amount of fuel to propel a massive space craft with supplies to set up living quarters on Mars would be prohibitive of a return trip. But even against that death sentence, thousands of people signed up for a private colonization of Mars. Why? Because they must believe their time on Earth is finite and uneventful while a trip to Mars would be immortal history of space exploration.
Did the LOST characters stumble upon a remnant of ancient space exploration disguised as the island? Perhaps. Nothing is outside the realm of possibility when it came to the divergent streams of show plot and story lines.