The Sun is located near the outward tip of the Sagittarius arm of the Milky Way. This makes Earth about 28,000 light years from the galactic core of our home galaxy.
There is also suspicion that our galaxy is in the process of absorbing other smaller galaxies
closest galaxy to the Milky Way lies within the Milky Way itself! The Canis Major Dwarf Galaxy is about 42,000 light years from the galactic center, and a mere 25,000 light years from us
jump drive is supposed to make a spaceship (or any matter) go from one point in space to another point, which may be several light years away, in a single instant