Our closest galaxy is Andromeda, and it is 2.43 million light years away. We are both on the order of 100,000 light years across, so to scale, the following shows how far we are from each other:
Don't hold your breath, but in 4 billion years our galaxies will collide into each other. That is not a long period of time, for our solar system is older that 4 billion years.
Further yet, say there is an advanced civilization 65 million light years away:
- The Big Bang was NOT the origin of the Universe.
- The shape of our Universe is NOT the surface of an expanding sphere.
- Galaxies are found throughout all of space.
- We don't really know how many stars and planets are out there because we can't see the entire Universe and don't know how vast it is.
- It appears, though, that our Universe is expanding.