Comment by tsimionescu
4 days ago
It is correct, and you're also right that two rockets tethered to each other would not feel acceleration. The acceleration we feel in Earth's gravitational field is affecting our speed, though - it's slowing down the speed at which we move towards the future.
> you're also right that two rockets tethered to each other would not feel acceleration
I just realized that the energy of the exhaust would warp local spacetime. So one might feel acceleration depending on how that geometry settles.