When developing. You solve one problem a time. So you don’t spend time trying to calculate rotation from gravity.

The beauty of a time machine on earth. Is that we can imagine most of it, and add the time travel part with our imagination to make it “plausible”

You want to add instant teleportation to any point in space at any time, while knowing everything about every planet and star including their location. Instantly.

I have a magical spell that already does everything you want. It’s called “goannoyium-someoneelsium-fuckwad”.

I already solved your little problem