How you might actually die by a black hole

[Feather Scribbles 194]

Here is something to think about... Imagine if you're an astronaut FAR in the future, and you are drifting towards a black hole.

Going slightly off topic, I was watching a space documentary yesterday, and it described what the experience would be like if you fell into a supermassive black hole. Since the black whole is much, much larger than a conventional black hole (but you are still the same size), the  gravitational pull on you would be more evenly distributed, and thus, you would actually survive longer inside a supermassive black hole than in a standard one. However, they never mentioned one key detail (located below):

 

 

Radiation.

 

So yeah, theoretically speaking, the amount of radiation that is being emitted by and around a black hole would be possibly millions, billions, or even trillions (or more?) times the lethal dose. So... in other words, you would be dead long before you reached the event horizon. Also, if anyone proposes an idea that far in the future, people will be able to harness the energy from black holes and build  a sustainable civilization around them... remember the rad.

I am correct, right?

Edited November 11, 2017 by Feather Scribbles

[SomeCoffee 119]

Saw something similar, though it wasn't a documentary on it's own. But assuming the similar topic, I feel almost positively right that the documentary was speaking theoretically. You're probaby right, I'm no space junkie, but they know it too and simply ignore it to further theories because it's super interesting. If they stopped caring because radiation will prevent us from EVER getting close, we wouldn't have awesome intriguing theories.

Plus we wouldn't have the fantastic word: spaghetification (which I hope Pinkie uses someday.)

I'm have no idea about the black-hole-radiation-civilization though, never heard of it.

Spoiler

I'm testing my knowledge on space lingo and will refrain from using Google.

Please confirm if you can.

Does the event horizon refer to the point juuust before an object enters the black hole?

And wasn't it a theory that, because time is warped (or super slow compared to Earth's time), you will never see an object actully enter a black hole? But instead, from the outside, it will appear to have frozen just before it enters.

 

[Stone Cold Steve Jobs 22,444]

If you don't have protection then yes. You would die once you hit the accretion disc, if not sooner. Depending on the mass and activity of the black hole, your survival time would be longer or shorter. If you were reasonably protected against radiation of a big black hole, you could in theory survive your trip past the event horizon. Ultimately, however, you would die a fraction of a second before hitting the singularity. This is assuming you were not roasted by the extremely high temperatures just before the horizon or otherwise killed by radiation and spaghettification. 

A smaller black hole? Forget it. You would be killed before you even got close to the event horizon.

[CheeryFox 23,823]

A black hole might not kill you, if by chance, you can avoid spaghettification, etc. If black holes are wormholes as some suggest, we could be looking at faster-than-light travel. 

[Stone Cold Steve Jobs 22,444]

Wormholes are unreliable. As soon as something tries to pass through one, it collapses. The only way to keep it open is through use of a constant stream of energy. 

[Feather Spiral 1,892]

On 11/12/2017 at 4:09 PM, SomeCoffee said:

Does the event horizon refer to the point juuust before an object enters the black hole?

More or less, yes - the event horizon is the limit where gravitational pull is so strong, not even light speed won't be enough to escape. Unless you can reach FTL velocity, you're basically fucked once you reach/pass that boundary.

This is, of course, all assuming you are: in an EVA suit to ensure survival + shielded against radiation + not struck by dust/gas moving at near-light speeds + not ripped apart by tidal forces.

[CheeryFox 23,823]

On 11/22/2017 at 10:05 AM, Someguyinablazer said:

Wormholes are unreliable. As soon as something tries to pass through one, it collapses. The only way to keep it open is through use of a constant stream of energy. 

That's true but - even Stephen Hawking said we really know-nothing about wormholes/black holes.