Upgrade your account to a Community Supporter account and remove most of the site ads.
Rocket your D&D 5E and Level Up: Advanced 5E games into space! Alpha Star Magazine Is Launching... Right Now!

Reply to thread

Message: <blockquote data-quote="Umbran" data-source="post: 9810931" data-attributes="member: 177">So, it isn't the same spot, but you meant the same spot?  You meant the thing that you say it obviously cannot be?  What?And you know the "only way"... how, exactly?  I mean, if you are a time traveler, and know, then tell us - we all stand to be able to live quite better using your unique abilities!Why?  You make this assertion, but give no reasoning behind it.I will try to restate my previous note, and see if it helps.Einstein tells us that there's no absolute measure of time, or of space.  There is no one fixed inertial reference frame in which the laws of physics work differently than in any other, or that we can refer to for absolute truth.  The best we can do is measure things relative to other things.There is, to first approximation, no reason to choose a "farthest stars" frame, in which the Earth, Sun, and Milky Way are all moving, over a frame that happens to be fixed to the foot of the Eiffel Tower.  The "farthest stars" themselves aren't actually fixed, even relative to one another - they only seem that way to use slow-moving, short-lived humans.  Neither of those frames is particularly privileged - the only reason to pick one over the other is how hairy the math comes out. So, if I am travelling in the lifespan of the Eiffel Tower, and start and end someplace mostly at rest relative to the Eiffel Tower, there's no reason the time time machine cannot be working in that frame of reference, and it looks to everyone on the planet like the traveler moved in time, but not in space, relative to the surface of the Earth.Now, yes, someone sitting around one of the farthest stars would say that the traveler moved in time as well as space.  But, WE DO NOT CARE.  His view of that isn't special, isn't privileged, isn't more true, than that of a person standing at the foot of the Tower.  Folks not in the chosen rest frame of the machine can basically bugger off, we don't need to care about them.</blockquote>

Verification