I have an alien that travels from ~100 light years away to Earth. He can make this trip in a matter of years though. He doesn't reveal how as he doesn't trust Earthlings since he has just come across new intelligent life.
Now, I have a guy that has created a telescope that is stationary on Earth able see in nearly perfect detail at vast distances into space. This alien now approaches my guy and gives him the coordinates to his home planet. The alien wants to show Earth his planet and people and technology they use using this "super" telescope that can look onto the surface of his planet as if we were looking look out a second story window at them.
What I have read is that the sun is 93 million miles from Earth and that it takes ~8 minutes for light to travel from the Sun to Earth. So we are basically seeing the Sun from Earth 8 minutes in the past. (Which blows my mind if you ask me)
Now when the man and the alien finally look into the telescope to see his home planet, will the alien be unpleasantly surprised to see his home planet the way it was 100 years ago? (Will he see his newborn grandma?)
Or does the ability to focus (zoom in?) on something so close with the telescope fix that issue and they will see the planet as basically when he left.