r/blackholes

Same

Please explain in very simple words, i know nothing of physics.

Edit: Thanks a lot, guys, for making it so simple. I finally got the explanation. Basically, a black hole merges space and time, and since time only moves forward, we can’t escape a black hole because that would essentially mean travelling back in time.

I know usually in modern physics it assumes the centre of blackholes is a ball of infinite density , or all the matter is compressed into a point of infinite density, but that doesn't make that much of sense to me , beside according to Pauli exclusion principle that Two identical neutrons cannot occupy exactly the same quantum state , since some of the blackholes are created from neutron stars the case of neutrons are particularly interesting, now if we forget about mathematical and look at issue from logic perspective and ask what solve the conflict between Pauli exclusion principle and neutrons that try to violate this rule is a filed that contains nothing, no electron filed , no particles , nothing, in real sense, if I want to put it in physically coherent speculation something like “Gravitational collapse reaches a boundary beyond which ordinary spacetime and its quantum fields are no longer meaningful physical degrees of freedom. I'm wondering what do you think?

If light is the fastest thing in the universe but isn’t fast enough to escape a black hole, would that make the black fast enough to contain light making rhe black hole the fastest thing in the universe? (Ps I know fuck all about black holes just a though)

One of the strangest recent JWST discoveries is *MoM-BH-1*\*, an object that existed only \~660 million years after the Big Bang.

Researchers think it could be a black hole surrounded by a huge cloud of extremely dense gas, making it appear almost like a star..

What really caught my attention is that objects like this might help explain the mysterious **“little red dots”** JWST keeps finding in the early universe.

If this interpretation is correct, could these “black hole stars” be an early stage in the formation of the supermassive black holes we see today?

What do you think — genuinely new type of object, or an unusual version of something we already know?

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Imagine an object with gravity so powerful that even light cannot escape. That’s a black hole. Black holes can form when massive stars collapse under their own gravity. Around them is an event horizon—a boundary beyond which escape is impossible. But here’s the interesting.

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我推測紅移現象在宇宙的觀測中極度嚴重，我們觀測到的紅矮星或許大多並不是真正的紅矮星，而是紅移現象導致

Hey guys, I been running a thought experiment through my head about black holes, speed of light, and antimatter, and wanted to get some feedback from people who know physics on where this makes sense and where it breaks down.

​Here is how I got to this idea:

​The Energy/Speed Problem - We know that as an object with mass gets close to light speed (c), the energy to keep accelerating it goes up exponentially and takes infinite energy to actually hit c. So even a huge gravitational pull shouldn't be able to push physical matter past the speed of light.

​High-Energy Collisions & Gamma Rays - In super energetic environments, kinetic energy converts into matter and antimatter (pair production). When regular matter hits antimatter, they annihilate each other and put off high-energy gamma rays. We already see massive gamma ray bursts right outside black holes.

​The Idea - What if a "black hole" is actually just a region where gravity is accelerating matter in the accretion disk so fast that particles collide and constantly create antimatter?

​In this scenario:

​The event horizon boundary isnt just curved space, but a dense region/core made of antimatter.

​Matter and light "disappearing" into the hole is actually incoming matter slamming into this antimatter zone and instantly annihilating.

​The gamma radiation we pick up around black holes is the direct energy signature of this constant annihilation.

​I know standard General Relativity says the event horizon is just spacetime curvature leading to a singularity, and that antimatter has regular mass. But as a thought experiment, what are the main observational or theoretical reasons that rule out the horizon being a physical matter/antimatter annihilation boundary?

​Curious to hear your thoughts.

My question is whether dark energy is the only plausible explanation for the observed acceleration of the universe.

Have alternative interpretations been seriously explored and ruled out?

My concern isn’t that the observations are wrong, but that we may be misunderstanding what we’re observing. For example, could this fit with some form of black-hole cosmology? Suppose matter/energy crossing a black-hole horizon doesn’t ultimately terminate at a singularity, but undergoes a transition inscale, re-emerging as an expanding spacetime at a lower scale.

From inside that descendant universe, could this scale transition appear as cosmological expansion or even contribute to the apparent acceleration?
I’m aware that “the universe is inside a black hole” isn’t a new idea. What I’m interested in is whether this explanation has been ruled out observationally, and if so, what observations have ruled it out? Also we know black holes grow and expand over time, which seems to be some kind of correlation?

Thanks!

I have seen black holes described as "millions of times the mass of the sun".

The nearest star to us is light years away.

How does a black hole draw in millions of stars worth of mass over these vast distances? Are there areas where there are stars packed thousands of times more closely together?

Astronomers have discovered a “black hole star,” an extremely bright red spot in the early universe that appears to be a new type of astrophysical object. It resembles an enormous star, but its energy production is closer to what a black hole might generate

If we took atoms from a black hole would we be able to invent a way to use them for time travel

I wanted to pitch an alternative cosmological model to spark some discussion and get feedback on its mechanics. I am trying to approach the problem of cosmic expansion from a "pull" perspective rather than an internal "push," and I think recent astrophysical findings might offer a loophole.

What if cosmic expansion and the continuous widening of the cosmic vacuum are driven by a massive, omnidirectional network of black holes distributed uniformly at or beyond our observable cosmic horizon?

In this scenario, we wouldn't have a single black hole sucking everything toward a central point. Instead, a vast distributed web of black holes would create a collective negative pressure gradient. This external gravitational gradient would pull the fabric of space-time outward smoothly in every direction, making galaxies appear to fly away from each other and leaving the expanding vacuums behind.

Connecting to Modern Data (Cosmological Coupling & DESI)

I realized this line of thinking heavily intersects with the recent Cosmologically-Coupled Black Hole (CCBH) models. Data from the Dark Energy Spectroscopic Instrument (DESI) suggests that dark energy is not a static Cosmological Constant, but actually changes and evolves over cosmic time. CCBH models propose that black holes grow in lockstep with the expansion of the universe because they enclose vacuum energy.

My model takes this a step further: What if this coupling is a two-way street? If black holes are intrinsically tied to vacuum energy and space-time metrics, a massive, uniform distribution of black holes at the horizon could theoretically act as the physical engine driving the time-evolving expansion history that DESI is currently mapping.

Addressing Potential Anomalies:

1. The Signal Masking Problem: A common critique is that we don't detect a distinct, local pull inside our solar system. My thought is that local massive bodies—like Jupiter—exert a dominant gravitational presence that dynamically blurs or masks our ability to isolate this microscopic background pull on nearby planets.

2. Kuiper Belt Drift: To find a clean signal, we would have to look past Jupiter to the outer ring of the solar system (the Kuiper Belt). If an external network of black holes is pulling at the universe, we might look for subtle orbital anomalies or drift among the distinct masses out there where local planetary gravity fades.

Questions for Discussion:

While gravity drops off via the inverse-square law, could a uniform, spherically symmetric distribution of horizon-scale black holes generate a net negative pressure that mimics a dynamic dark energy equation of state?

How would we model a space-time metric where the primary expansion force is a collective external gravitational gradient rather than intrinsic space-time stretching?

I'd love to hear your thoughts on the physics of this, where the math might break down, or how it might inspire alternative ways to look at cosmic expansion!

-Dynamic Omnidirectional Gradient (DOG) Model by Amit Verma.

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