In an instant from the point of view of the people on Earth, but from your point of view time still moves forward.
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jaschen@lemm.ee 3 days ago
Hear me out. It doesn’t even matter that it’s 96 billion light-years away if you’re traveling at light speed. Because if you can travel at light speed, time would be better Frozen for you relative to earth time.
So if you’re in a spaceship traveling at light speed to your destination, it would feel like you gotten there in an instant.
Kecessa@sh.itjust.works 3 days ago
Ibaudia@lemmy.world 3 days ago
Other way around. Instant from your POV but not from Earth’s.
Gutek8134@lemmy.world 3 days ago
Not the other way? You’d feel like you got there in an instant, while people on Earth needed to wait years?
deranger@sh.itjust.works 3 days ago
Time is frozen at light speed. You also don’t experience any distance at light speed due to length contraction. You arrive at your destination instantaneously, not even experiencing a tick of Planck time, and you didn’t even travel a Planck length to get there.
jerkface@lemmy.ca 3 days ago
Well, you arrive at A destination instantaneously. Important distinction. Though you might not all arrive at the same destination. And since no time passes for you and your computer… how exactly do you decelerate again? If you are going the speed of light, then you ARE light. You have ceased to exist as a Lemmitor. There is no coming back.
hemko@lemmy.dbzer0.com 3 days ago
You’ll need to accelerate to the light speed though, which will take time.
So for the astronaut it’d take approximately a year to reach light speed if accelerating at 1G, and another year to slow down
deranger@sh.itjust.works 2 days ago
I mean if we’re already violating physics by having objects with mass going the speed of light, I don’t see what’s wrong with also assuming the thing we have for going light speed can’t also instantaneously accelerate.
deranger@sh.itjust.works 3 days ago
Also, due to length contraction, at light speed the universe isn’t 96 billion light years wide, it’s 0 anything wide.
At light speed there is no time and no distance, the origin is the destination. You won’t even experience a single tick of Planck time to get there. Instantaneous.
Fluke@lemm.ee 2 days ago
Doesn’t it also require infinite energy to do so if “the thing” has mass at all?
deranger@sh.itjust.works 2 days ago
Yes, it requires infinite energy for any mass to get to light speed.
I don’t think our understanding of physics breaks down at such extremes though. I believe it’s decently understood, as in general and special relativity. I’m not a physicist though.
Fluke@lemm.ee 2 days ago
It’s my understanding that whenever infinity is encountered, it means that our model doesn’t quite work.
It may be the way it is with this particular model/equations/bit of physics, and it may simply indicate “Nope”. I suspect not though.
docoptix@lemmy.world 2 days ago
AFAIK the observable universe is limited by the parts of space which expand faster than the speed of light.
Some billions of years later and we might have not seen other galaxies at all, maybe we are lucky.