Ok… so…
- Pull you in with the power of gravity
Does not ‘suck’ you in with the power of a vacuum…
About right?
You fall into gravity wells, they don’t suck you.
Best way to understand is to get the mental image of spacetime as a 3d sheet like grid, where each object pushes down on it and creates a pit, or well. The bigger the object the deeper the well, and the more force you will need to stop yourself from sliding towards the object and propelling yourself back up the slope.
Pedantry, thy name is this article.
:nerd:
Pretty sure anyone living in these solar systems. Considers their star to suck.
I imagine all the parties are pretty lame.
Well there goes my dream of getting sucked off by a black hole!
Sounds like you can still get pulled by a black hole though!
Pulling, when done well, can be as nice and effective as sucking, and I’m sure black holes have a lot of experience in pulling things.
and don’t dismiss the bragging rights for being that guy with the longest penis ever
Universe’s longest needle dick.
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Eh thats kinda nitpicky. For non physics people “sucking in with lots of force” is good enough to describe “absurdly strong gravitational pull”. Its not a myth, its an over simplification.
I think the point the article was trying to make is that “sucking in with lots of force” does not really happen any differently outside the event horizon of a black hole than it would in the proximity of any other star (or object) with the same mass.
So it’s addressing the “myth” that being in the proximity of a black hole would inevitably suck you in… however, odds are that if you are not directly aiming for the black hole, even if you did not resist, you would just end up entering an orbit around it, the same way we are currently orbiting the Sun. Or maybe even be catapulted out of it, instead of sucked in.
The difference would be that past the event horizon you would be torn apart by the space distortion (instead of being cooked alive if it were a star). But theoretically if you can avoid crashing into a star, then you can avoid entering a black hole.
does not really happen any differently outside the event horizon of a black hole
I mean, that’s a pretty big caveat, given that strength of the gravitational force in the object was big enough to create the event horizon in the first place
It’s exactly the same gravitational pull as the star that previously collapsed… (And I’ve not read the article (yet), this is just a personal nitpick that I’ve had for a LONG time).
–edit after reading the article–
In terms of inevitably falling into a black hole, it’s only the material that formed interior to three times the event horizon radius — interior to what’s known as the innermost stable circular orbit (ISCO) in general relativity — that would inexorably get sucked into it. Compared to what actually falls into the event horizon in our physical reality, the purported “sucking” effects are nowhere to be found. In the end, we have only the force of gravity, and the curved spacetime that would result from the presence of these masses, affecting the evolution of objects located in space at all. The idea that black holes suck anything in is arguably the biggest myth about black holes of all. They grow due to gravitation, and nothing more. In this Universe, that’s more than enough to account for all the phenomena we observe.
That summary explains it better than I can.
I disagree. It is more than just a nitpick. Saying black holes suck things in implies that they are doing something different than any other mass. Which they are not. Would you say a star sucks in stuff around it? Or a planet? Or moon? No. That sounds absurd. It makes it sound like blackholes are doing something different to everything else - which is miss-leading at best. They way things are described matter as it paints a very different picture to the layman.
Would you say a star sucks in stuff around it? Or a planet? Or moon?
For a star, I absolutely would. For a planet or moon, it depends on the context.
Would you say our planet is currently being sucked in by the Sun? or would you rather say that we are just orbiting the Sun?
Because odds are that if you approach a black hole without aiming directly for it, you might just end up in an orbit around it, not unlike we currently are around the Sun. Or you might even be catapulted out, instead of being “sucked in” in the popular sense.
In the case of the earth, no, I would say its an orbit. But if the path wasn’t circular and instead was describing the sun pulling somthing away from its existing trajectory significantly, then yes, I might describe it as the sun sucking it in. Obviously doubly so if it actually is destroyed by the sun.
Then, under that interpretation, whether a black hole “sucks in” depends entirely on the trajectory you have. I’d argue then that considering all possible trajectories, you are more likely to not be sucked in by the black hole.
The path the Earth traces isn’t circular, it’s more like it’s spiraling forming ellipses around the Sun and progressively getting further and further away from it (so we are actually slowly being pulled out rather than sucked in). If instead of a Sun we had a black hole with the same mass, nothing would change in that respect, since gravity only depends on the center of mass.
The difference (other than the temperature and light) is that a black hole is very very dense so it would be much much smaller. This means you can get a lot closer to it and this is what makes the gravity skyrocket (since gravity relates to the distance squared). With a star, you can’t get close enough to its center without reaching first the INSIDE of the star… and once you are below the surface of the star then the mass between you and the center of the star gets progressively smaller the closer you get to its center (and the mass that’s behind you will get higher and higher), so this dampens the gravitational pull.
My point isn’t that a black hole is unique or anything else of the sort. Heavy objects try to suck in lighter objects around them. The reason I was saying I would only sometimes describe it as being “sucked in” was because that suggests being significantly pulled towards the object, whereas if it is a fairly stable orbit or the object’s trajectory being slightly bent, I wouldn’t describe it as such (black hole or otherwise). Even with a gas giant, It wouldn’t feel wrong to say it sucks in nearby debris.
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Saw a clip of ol Neil coming along and saying that Mount Everest wasn’t the highest point on Earth to a physicist because of the equatorial bulge and “sea level” not mattering to physicists.
Yeah sure just blatantly disregard the entire human perspective of the world and how we as people relate to it to say make up some dumb “gotcha haha” to sound smart.
So many people, him specifically, are incapable of framing things in a non dismissive way. It could have been an interesting point or piece of information about how how large the equatorial bulge is, but he’d rather come off as an insufferable nerd.
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Maybe chill with the ableism. You can call a removed a removed without bringing disability into it.
I think you’re referring to the gardening implement, but Hexbear did a funny to your comment:
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What’s confusing about being told to chill it with the ableism? You used dyslexic as a slur.
Edit: and then misspelt another slur
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Assumes i know what ableism means. It means nothing to me. This is the truth. I could look it up, but it just looks like, lingoism
I’m gonna be real with you sib, this has levels. First of all, you don’t know what ableism is? Are you 10? Even if you hadn’t encountered the word before, are you seriously so ignorant that you can’t guess a definition from the fact that it’s made up of “able” and “ism”? Even worse, you know you could look it up, but you’re rather remain ignorant. What the fuck kind of respect do you think you’re gonna get for saying you’re an idiot that doesn’t want to learn?
Well take a second to overlook those things though, take the wider view of you refusing to look into a word you’re unfamiliar with because it’s “lingoism”. So you won’t find out what a real word means because of a word you just made up. What is it even supposed to mean - some sort of language ideology? Are you saying you won’t look it up because it’s a word? The entire premise is just so fucking incoherent.Censoring my speech, i’m also not really interested in. So i’ll say some shiat
You already used “caunt”, so there’s 2 possibilities here: either yes you do censor yourself, otherwise you’d be writing shit and c**t, or you’re just dyslexic, in which case you’re trying to insult people by saying they’re just like you.
Whatever the case is for either part, it is extraordinarily evident that you’re thicker than pig shit. Just stay on gitbhub, you don’t have the intelligence for opinions.
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Anyone else get the impression it’s a slow news day?
“This is the only context in which black holes even appear to suck matter in: as they absorb matter that undergoes gravitational infall due to the black hole’s mass”
I may not be the smartest of person but this article seems to contradict itself a little