but time is not objective and that means speed is not objective, either

or rather, universal

You know what he means, stop showing off.

Listen mr Niel Degrasse Foucault he obviously meant as a whole object experiencing such travel in realtime not on some atomic level

muh time dilation

Well i dont actualy know what people exactly mean by FTL. What you would think of if you look at it from a naive pov wouldnt make sense taking the nature of space and time into account.

What they mean is RLLY FAST.

FINALLY https://twitter.com/SenateCloakroom/status/1047666186035580928?s=19

listen im all for further explaining physics but i think its pretty well accepted the common conception of faster then light travel, all im saying

Don't you need something known as an alcubierre drive for FTL?

Or is that time travel

Okay heres the thing about FTL travel. You can calculate the time that passes from the reference frame a object moving relative to you rather easily. Its the squareroot of the difference of the distance they move to what light would move in the same time squared. For example, if you see an object that takes 6 seconds to move 2 lightseconds relative to you, its the squareroot of 6² - 2².

If an object were to move at the speed of light, it takes zero time from the perspective of that object...

and negative time, somehow, if it were to be even faster than light...

What laymen mean by FTL

SHUT UP I FAILED PRE-ALGEBRA WTF IS THIS GIBBERISH?!?!?

Is that you from your starting position can reach somewhere before the light from a flashlight that someone standing next to your starting position does.

That's it.

Whether it's done through a wormhole or some other not yet understood means doesn't matter.

They just mean really really really really fast

Wormholes may be able to do that, actualy. Though there are problems with that

And it means fast from the perspective of the people at the starting point, and the travelers.

Cause, if you did that twice, once reaching alpha centauri and then back, you could be back earlier than you started...

^show your work

alcubierre drive probably can't move faster than light either. not if it ever wants to interact with the universe again. the control systems would still be bound by light speed, and if it moves faster than light it can't control itself.

it's still useful obviously

from the perspective of the ship with an alcubierre drive, i was under the impression that the ship isn't actually moving faster then light

But i dont see the issue in sub lightspeed travel. If you do move at a significant portion of the speed of light, after all, you will still barely experience any time yourself during your travel

ok yeah. The alcubierre drive isn't moving faster than light, it's warping space around it using an energy density field

Well if you're wanting to visit someone you know in another galaxy they'll have been dead for thousands of years by the time you get there

If you got real close to it, suns may burn out around you but...

Luckily, all the people i interact with are real close

everyone knows about the satellite clock problem right?

since we're talking about FTL and gravity (since the two are obviously linked)

Not really a problem, is it? I know we have to take relativity into account for satelites if thats what you mean

Maybe problem was a bad descriptor. But yeah that's what I mean

I remember when I learned about it how cool I thought it was

minutephysics has a good series on relativity https://www.youtube.com/playlist?list=PLoaVOjvkzQtyjhV55wZcdicAz5KexgKvm

Someone is looking through the Kavanaugh yearbook and commented with this
```kavanuagh is really lucky he didnt take part in whatever injoke lead to dozens of the students listing themselves as part of the "ridge klux klan"```

Wow I can't believe kavanaugh went to school with a bunch of KKK members. Do you think they may have entirely shaped his world view, and that he is literally a KKK member?