Suppose an Astronaut is going to make an orbit around a passing neutron star.
The astronaut fails to consider the effect that intense gravity fields have of slowing time passage for all mass in their vicinity.
According to the clock on the astronauts ship his orbits lasts a few months.
The clocks on Earth however show a time passage of 10,000 years and the fast moving neutron star has traveled to another star system.
To earth the astronaut is missing.
To the astronaut it appears that he has moved over a few months a distance of several light years to a distant solar system.
The only unfortunate prospect is that if he attempts to return to earth orbiting an identical neutron star which happens to be heading in the desired direction he will arrive at Earth 20,000 years after he left.
If the astronaut considered the gravity effect on time the location of his departure from the neutron star would allow him to travel to any location along the neutron stars path.
This is of course assuming that nothing changes the path of the neutron star in transit.
This thought experiment proves that worm holes do exits, however time dilation with respect to earth can not be avoided.
Time dilations can be compensated for however.
The astronauts wife being devoted to her husband can not accept being separated.
She also enters a space ship and proceeds to orbit a neutron star which is traveling parallel to Earth causing the same time dilation that the astronaut has experienced and when he returns he finds 20,000 years have passed for everything and every one but his wife.
The two of course live happily ever after if "ever after" is defined as 20,000 years in the future.