It's the same unit of distance, just with a prefix.

The figure shows it during four seconds, or any other unit , of time, and also for any unit of distance.

I have reckoned the 'li,' the Chinese unit of distance, as equivalent to 0.26 of a mile.

A parsec is a unit of distance, not time, so why would Solo use it to explain how quickly his ship could travel?

For now, let me just say parsecs is a unit of distance where 1 parsec = 3.26 light years = 3.08 x 1016 meters.

"You wouldn't have happened to notice the rate of change in width per unit of distance traveled on this trail, would you?"