You can use the cosmic microwave background as a universal reference frame. Relative to that we move at about 370 km/s, depending on the time of the year.
Pretty sure there is no absolute universal position, everything in the universe being in motion relative to everything else as the universe expands, but that does not disprove your point anyways.
bjoern_tantau@swg-empire.de 7 months ago
horseloaf@lemmy.world 7 months ago
Now I’m hurting my head by thinking about traveling faster than 370 km/s in the opposite direction to Earth…
bjoern_tantau@swg-empire.de 7 months ago
For reference: Voyager 1 is traveling at 17 km/s away from the sun. The Parker Solar Probe should reach 191 km/s but will be flying towards the sun.
WhoLooksHere@lemmy.world 7 months ago
The reason it doesn’t disprove it is because the assumption “time travel works” is really just saying, if we ignore some basic rules of physics, what happens to what’s left? It’s a nonesense premise to debate what is basically nothing more than science fiction.
Could the rules we know about the universe be wrong? Absolutely! But discovering those new rules is what will answer that question. Till then, we might as well try and say Harry Potter is just quantum mechanics.
FreeLikeGNU@lemmy.world 7 months ago
Look up Dr. Ronald L Mallett. This astrophysicist has some interesting takes on practical time travel. There’s a great interview with him by Fraser Cain of Universe Today.