Spaghettification Definition and 14 Threads

From what I understand about time dilation and the relativity of simultaneity; if we imagine two people near a black hole and one of them begins to approach the black hole on a trajectory that crosses the event horizon. The stationary observer will never see the moving observer enter the black...

(Classical model) The radial "stretching" is caused by differential gravity (tides), but what is the lateral squashing caused by? Is it because the "force" of gravity is not parallel, but instead comes from a point, forming an acute angle? (Einsteinian model) I guess it's pretty trivial to...

I enjoy explaining spacetime curvature to people with a rank-beginner understanding of GR. But someone asked about that favorite concept in pop-sci, spaghettification. I'm having a hard time with it. If you fell into a black hole, there's no reference frame within which you could describe...

Looking for geometrical description / mathematical approach to describe Spaghettification to a given body. Is there a specific paper (maybe computer simulations) that can serve me to understand in detail the phenomena?

I did an exercise about beacons falling radially into black holes from Carroll's book and got a formula for the proper velocity$$ \frac{dr}{d\tau}=-\sqrt{\frac{R_S}{r_\ast}}\sqrt{\frac{r_\ast-r}{r}} $$It's in natural units (##c=1)##, ##r_\ast## is where the beacon is dropped from and ##R_s=2GM##...

Hi everyone When a smaller black hole gets sucked into a larger one, is it theoretically possible for the gravity of the larger black hole to stretch the smaller black hole so that it no longer has an infinitely dense centre? I guess it won't matter once they are completely merged, but in...

Per my layman's understanding, the apparent force of gravity, as explained by the general theory of relativity, is actually the result of rectilinear motion at uniform speed through warped spacetime. 1. If that's the case, what actually causes gravity for objects at rest with respect to the...

Dear PF Forum, Can we avoid spaghettification for some times, once we're inside event horizon? I choose a rather massive black hole, so the tidal force won't be so big at EH. Mass: 1 trillion solar mass Schwarzschild radius: 2.950 trillion KM What is the gravitational force at EH? I calculate...

I need to find the vectors for time and radius that describe a space-like 4-acceleration of an observer falling radially into a spherically-symmetric black hole. Previous to this question, the values of the real time derivatives for time and radius were derived to be: dt/dτ = (1-2m/r)-1 and...

Hi, I've heard and read that if someone was to fall towards a black hole, say feet first, they would undergo spaghettification at a certain distance, as the gravity at their feet would be much greater than the gravity at their head, and their body wouldn't be able to reisist the pulling effect...

I posted this question on another forum, and, the answers, thus far, have not really helped me out very much. So, I figured physics questions are best directed toward the 'physics guys'. Here is the text of my two posts. I feel like the problem probably lies with my extremely limited...

This is my first time posting on the forums, so please be nice if I mess up :) My question is this: After matter falls past the event horizon it undergoes spaghettification. Now let's say a human falls into the black hole. His hand enters first and is being accelerated faster than the rest...

I heard recently that a supermassive black hole would not tear you apart like a smaller black hole would, that you would simply “flow into it never knowing that you are doomed until it is too late”. Is this true and if so why?

Homework Statement In the Schwarzschild Slalom, brave athletes dive from a platform orbiting at a distance of 1 AU from the singularity at the centre of a black hole with a mass of 10 MSun. The competitor who can get closest to the singularity, and survive, wins the event. (The rules state the...