4 ms·
I don't think this is right. You leave at t=0 and arrive at your destination at t=1 year. It then takes two years for the image of your arrival to travel back t
by brianberns 6y ago
I don't think this is right. You leave at t=0 and arrive at your destination at t=1 year. It then takes two years for the image of your arrival to travel back to Earth, where it can be perceived at t=3 years.
However, when you arrive at your destination, you can look back at Earth and see an image of yourself 1 year prior to your departure.
- qubex 6y agoYup, I think you’re right, and that I’m wrong.
- brianberns 6y agoBTW, the other weird thing about this scenario is that if you look backwards along your trajectory, you will see a movie of your journey playing in reverse! Also, in regard to your edit: this doesn’t really have anything to do with relativity. Newton would’ve come to the same conclusion.
- qubex 6y agoMy reference to relativity was to indicate that I thought it would lead to different conclusions than the Newtonian case. As for the two images, it’s well covered on PBS Spacetime’s overview of the Alcubierre Drive from several years back that if a bystander were to observe a FTL craft traverse their field of view laterally, they’d indeed see two images, each heading in opposite directions, as you indeed allude to.