@yon@sakurajima.moe
You’re kind of overlooking the fact that we, too, are moving through space, and doing so at the same speed as the Earth’s surface. So, even if you were freed from the confines of gravity, you would still be moving laterally at the same speed as the ground. And so would any device or portal you were utilising. There’s no reason to treat the timd travel device as stationary in space.
And that’s ignoring the fact that “stationary” is an inherently relative term. You always measure velocity relative to a reference point, and the universe has no universal standard for this. There is no background, stationary coordinate system underpinning space. The question of where Earth was yesterday is totally meaningless without pointint to some other object in space.