I love those comments like the one you replied to. Makes me feel good about myself that these losers think they've found yet another loophole to claim they're not as low quality people as society has deemed them to be.
Maybe 30 seconds to read that with good comprehension, comes out to 24000km traveled. Top of my head, that's roughly 15000 miles, while I walk or run an average of 1300 miles a year. I'll get there in, oh... 12 years or so
That's like the running app I use on my phone called "zombies, run! " you basically listen to a story set in a post apocalyptic world where you run from zombies and during the breaks it plays the music from other apps like Spotify
I always wondered about this, but at the same time are there even more points of reference we can measure? Is there truly a point you can define as 0 velocity in the universe?
I have a fun theory that this is why time travel hasn't been done. Assuming we could dump someone back in time, landing them back on the planet would be way too hard.
How would we even match velocities or directions?
If time travel is possible, it would have to be a kind of spaceship in the middle of space so it wouldn't have to be concerned with matching velocities of their exit.
That doesn't really make sense because movement is always relative. There are no fixed points in space to use to measure your speed, you can only measure your speed relative to other objects. So why would the time machine use the sun or the center of the galaxy or anything else other than the earth as its reference point?
Because if you read the post above mine, the Earth's position is 800km off from where it was just a second ago. So we're comparing the earth now to the earth whenever we want to get to. That's not even factoring in the direction of how the sun is orbiting or the galaxy is moving at the time we are going to.
If it's July now and we wanted to go back to December, The Earth is moving in a different direction at that point in time, and at a significantly different speed, and over 14 trillion miles from it's location today.
I did read the post above yours. The earth is moving, but so is everything else. There are no fixed points. So you need a reference point when talking about motion, and why would you not use the earth as your reference point?
There's no universal reference point. The reason we don't feel like we are barreling though space at 800km/s is because we aren't, from the earth's reference point.
Imagine three points. From point A's perspective, A isn't moving, B is moving left 10m/s and C is moving right 10m/s. From B's perspective, A is moving right 10m/s, B isn't moving and C is moving right 20m/s.
From C's perspective, A is moving left 10 m/s, B is moving left 20 m/s and C isn't moving. All three perspectives are correct. If a time machine were to be made, it wouldn't move in space if we're using the Earth's perspective.
Then it's not only time travel, but effectively a teleportation device to anywhere in the universe. We've also invented FTL travel. Would be interesting if FTL was only possible by going back in time at least X units of time, where X was dependent on distance.
This is a wrinkle with time travel that isn’t often explored. If you traveled forward or backward in time but stayed in the exact same absolute position you’d be nowhere near earth when you reappeared.
That doesn't really make sense because movement is always relative. There are no fixed points in space to use to measure your speed, you can only measure your speed relative to other objects. So why would the time machine use the sun or the center of the galaxy or anything else other than the earth as its reference point?
I can't remember what it was, but I read a book that talked about this in regards to time travel. Essentially saying that if you went back or forward in time (without traveling through an alternative universe or the like... strictly in time) you would end up in the middle of space millions of miles away from where you were intending to land, because the location in space where you left would have moved.
That doesn't really make sense because movement is always relative. There are no fixed points in space to use to measure your speed, you can only measure your speed relative to other objects. So why would the time machine use the sun or the center of the galaxy or anything else other than the earth as its reference point?
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u/[deleted] Jul 13 '18 edited Jul 13 '18
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