Even if humans could travel at the speed of light, many galaxies in the universe would remain beyond our reach. The universe is constantly expanding along with all the galaxies it contains.
Galaxies are moving away from us faster than the speed of light as the universe continues to expand. Galaxies 18 billion light-years away will never be reached by mankind.
As time goes on those galaxies will always be beyond our reach. Almost every place in our universe is filled with stars and galaxies.
Scientists can observe up to 46.1 billion light-years away from their place. As far as scientists can see in the universe, there are about two trillion galaxies.
These galaxies remain beyond the reach of most scientists. As the universe is expanding, our distance from these galaxies is increasing with time.
Galaxies located 14.5 billion light-years away are quite difficult to reach. Because all those galaxies are moving away from us at a much greater distance than the speed of light.
The expansion of the universe is known as the Hubble constant. Scientists have found that the rate of expansion of the universe is slowing down day by day. Again, a study after 1990 showed that this speed is increasing due to dark energy and the universe will continue to expand.
Dark energy alone accounts for 70 percent of the universe’s energy density. The density of dark energy remains the same no matter how much the universe expands.
Scientists may never reach all the galaxies beyond a certain distance. Even running at the speed of light would not be possible. Scientists can only reach galaxies within 18 billion light years.