# Time and space travel as applied to expanding space and the ratio of/between time and distance

If a place is 500 light years away, then I set out to this place, then is it true to say that, the place which I set out from, will be 750 light years away from my destination, once I have reached it?

I am thinking of expanding space, as the reason for the additional distance possibly accumulated. Also to be considered for other galaxies separate from our own. Also what would be the estimated increase in the distance would it be half as much, or a quarter or third?

If the speed of light is 186 282 miles per second, then what would be the distance of expansion accumulated which occurred within the time it would take for a craft traveling at this speed to reach a galaxy beyond ours, or even a distance of 500 light years away, obviously there are innumerable distances of light years which could be applied to this calculation.

• @DialFrost This is a repost of a question from a few weeks ago which was automatically deleted because the system thought it was abandoned. Some of the info in the question was added in response to comments. Commented Nov 3, 2022 at 5:31
• @PM2Ring Ah my bad, I didn't look closely enough (I can't see deleted questions either) :3 (Close vote retracted) Commented Nov 3, 2022 at 5:34
• 500 light-years from Earth is well within the Milky Way galaxy. As such, the overwhelming effect on the distance between your origin and destination on arrival is the relative motion of the two objects and your travel time, not universe expansion. Commented Nov 3, 2022 at 10:16
• Not even just the overwhelming effect, but the entire effect! The galaxy isn't expanding.
– Sten
Commented Nov 3, 2022 at 13:40
• You can't have a spacecraft travel at the speed of light. Commented Nov 5, 2022 at 18:11