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Many a hungry time traveler has Googled ‘trilobites shellfish allergy’ only to find their carrier had no coverage in the Ordovician.
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Many a hungry time traveler has Googled ‘trilobites shellfish allergy’ only to find their carrier had no coverage in the Ordovician.
There is. Just because we can’t correctly find and use it with our knowledge doesn’t mean there isn’t.
What would be silly is thinking that earth is some magical center of the universe… We have abandoned this concept about 500 years ago.
https://en.wikipedia.org/wiki/Geocentric_model
It isn’t about how humans view their place in the cosmos.
It’s about relativity.
Space and time are inseparable. Hence the term space-time. You can thank Einstein for that.
The comment you replied to states It’s also about frames of reference, probably one of the most crucial aspects of relaticity.
Einstein has proven that time and space appear and are experienced differently for each and every observer. With the effects being significantly different depending on gravity, speed and distances.
If you could reverse time travel then the space would conform to the time you travelled to.
Really? What else would conform to the past point in time? Would fabric in my clothes disintegrate and transforms to something else? Would I, because I, well, didn’t exist in that past? Then it wouldn’t really be time travel, would it?
Or would the clothes stay, because they are mine and important for me and would I stay on earth, because that’s my baseline? Is universe somehow “me-centric”? Not really likely, is it?
You need to abandon your idea of time travel as seeking in a video with rewind button.
According to our current understanding of physics time travel is impossible, but we are talking about a word where it is clearly possible, so you can’t really constraint yourself with the limits as we know them now.
I don’t exist in the future, yet, here I am, in the future, with all my clothes in tact.
There is nothing in physics that actually says it’s impossible.
Maybe your current understanding of physics says it’s impossible.
Nothing about it is about me.
IT’S ABOUT FRAMES OF FUCKING REFERENCE. Inertial frames of reference, relativistic frames of reference, etc.
(This is relativity, if you think it’s about me, you obviously need to learn little more.)
*Also, I’ve blocked this user.
I don’t think that’s a particularly useful thing to do when discussing physics, throwing a temper tantrum because someone has a more casual understanding than yours.
Oh no, have you used the word relativity too many times and now you have no more arguments? :D
If we can’t find the cosmic frame of reference, then how do we know it even exists? Sure, you can assume it exists, and call that a hypothesis. If only someone had a way to test that hypothesis.
Ok, that’s fair point.
No. It’s called relativity for a reason.
Since a time machine has to fiddle with space-time somehow and that is an attribute of the universe – i agree, the universe is the frame of reference.
We disproved a cosmic frame of reference, or “ether” hypothesis using interferometry. It is well worth a read, I think you will enjoy it.
The earth is not a magical center of the universe, it’s just convenient right now to use it as a frame of reference no need to associate it to magical thinking.
I hear the universe is infinite, and no matter how far away from earth you go, there’s just infinitely more universe. So like if you are standing on earth looking twelve billion light years that way and then twelve billion light years the other way you are in a sphere of unimaginable size right? But if you actually went twelve billion light years that way once you get there you can still look this way or that way and see twelve billion more light years every which way. So from that perspective, pretty much anywhere in the universe is the center of the universe…from a certain point of view…