If Star Wars was a long time ago in a galaxy far far away, does that mean we could witness it happening through a telescope?

Let's get past all the obvious disclaimers first:

Star Wars isn't real.

Even if it were, we don't have telescopes powerful enough to see a single planet, let alone spaceships, in distant galaxies.

Now then, to answer your question: it depends on how long ago it was, and how far away the galaxy is. The Andromeda galaxy is 2.5 million light years away. If Star Wars happened 2.5 million years ago, then the light from those events would just now be reaching Earth.

(Actually, it's more complicated than that. The Andromeda galaxy is about 220,000 light years across, so we would actually see different events from across the galaxy arriving over a span of about 220,000 years.)

Assuming that the events in Star Wars actually happened, it would be a huge coincidence if the number of light years between that galaxy and Earth were exactly the same as the number of years that had passed since the events happened. More likely than not, we'd be seeing events that came much earlier or much later than the events described in Star Wars. For example, if Star Wars happened in the Andromeda galaxy, but only 1 million years ago, then we'd still have to wait 1.5 million years before we saw them happening from Earth.

I hope that helps. Good luck!

EDIT: Also, you don't see the Big Bang 14 billion light years away. You're not accounting for the expansion of space. The Observable Horizon is actually about 46 billion light years away, and it doesn't represent the Big Bang. It actually represents an event called Recombination that happened about 380,000 years after the Big Bang. Prior to Recombination, the Universe was opaque and light couldn't travel very far. We cannot actually see all the way back to the Big Bang because of this. However, it IS accurate to say that the light from the edge of the Observable Universe is about 13.8 billion years old.

You'd need a *really* good telescope; we can't even see the landing sites on the moon from the Earth, yet... Seeing spaceships (even the Deathstar) wandering around another galaxy is clearly beyond our means... However - depending on *when* it occurred - say, it happened 2.3 million years ago in the Andromeda galaxy, for example - **if** we had clear enough vision, yes, we could watch it happening.

Yes, yes you can. All you need to do is point your telescope in the proper direction (don't vary by even a micrometer). What direction that is has not been revealed yet, but if you find it, you could become famous!

Or, maybe it happened 5000 years ago, but was 1000 light years away. So the images would have reached us 4000 years ago, but no one knew to look for them,a nd everything is done and over, and nothing to be seen today.

It's pretty fascinating how looking at the stars amounts to time travel, isn't it? It's one of those revelations that makes us stand in awe, sometimes.

with a telescope the size of a galaxy, you might be able to make out the details of the death star.

Of course not. Don't you know it's fiction?