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/sci/ - Science & Math

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10541442 No.10541442 [Reply] [Original]

What are some numbers on time dilation near supermassive black holes? It slow downs, but how much? Could you camp there till the very end of structured matter in universe?

>> No.10541454

>>10541442

https://youtu.be/mht-1c4wc0Q

>> No.10541489

>>10541442
The radiation is going to be extrema, a shit ton of crap is going to be spiraling in on you at incredible speeds, and if you orbit decays at all, it would be a Bad Thing.

So, regardless of the time dilation, there may be practical issues with your plan.

>> No.10541526

>>10541442
https://en.wikipedia.org/wiki/Gravitational_time_dilation#Outside_a_non-rotating_sphere

>> No.10541566

>>10541442
The rate of time near a black hole, as compared to a distant observer, is sqrt(1-R(s)/R), where R(s) is the Schwarzschild radius (radius of the event horizon), and R is your distance from the center of the black hole.
You can see that, as R shrinks down to Rs, the rate of time drops to 0.

>> No.10541889
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10541889

>>10541566
so with biggest known (to my pop-sci google search) black hole with 17x10^9 solar masses, orbiting around it, 1 kilometer above Schwarzschild radius would make time goes around 4.5x10^6 slower... but you'd need to travel at 0.7c

>> No.10542227

>>10541442
As much as you like if you get close enough, but you'd need an endless supply of rocket fuel to hold you in place.

>> No.10542340

>>10541454
based spacetime to the rescue in every black hole and GR thread

>> No.10542386

>>10542227
You'd never fall in tho because time would stop ass you get closer. You'd see the universe emd before your fall finished

>> No.10542407

>>10542386
Wrong

>> No.10542420

>>10541442
the bigger the black hole the less violent is the curve of space-time before the event horizon, so the slowing of time is not signifiant until you get fuckin close to it

>> No.10542433

>>10542386
Time doesn't stop from your perspective near the black hole. You'd still need to wait out the relative difference even if the rest of the universe appears to be in fast forward to you.

>> No.10542463

>>10542420
So a sufficiently large black hole outside of spacetime is indistinguishable from time travel?

>> No.10542485

>>10542463
>black hole
>outside of spacetime
It IS spacetime.

>> No.10542560

>>10542485
But outside of that.

>> No.10543046

>>10542227
with right velocity and angle you could get on orbit

>> No.10544896

Could you argue as you are going faster around the black hole, it would cancel any time slowing effect out?

>> No.10544994

>>10541889
How many orbits till you get to see the end of the universe?