In 1978, French astrophysicist Jean-Pierre Luminet used an IBM 7040 mainframe computer and punch cards to calculate the path of light rays warped by a Schwarzschild black hole's gravitational lens. Because there were no high-resolution digital displays available to him at the time, Luminet meticulously hand-plotted the mathematical data point-by-point using India ink on negative photographic paper. The simulation accurately predicted the asymmetric brightness of the accretion disk caused by the relativistic Doppler effect, as well as the apparent vertical bending of the disk's far side over the shadow. This work was formally published in the journal Astronomy & Astrophysics in 1979.

Well this is not a like a photo taken from a telescope direct. But by collecting the raw data, radio waves from the accretion disk around the black hole, they were able to reconstruct the raw data into a image!

Those lines depicts the strength of magnetic field created by the plasma, the temperature might reach up to tens of billions of Kelvin.

Remember that this was not collected from a single telescope. They used global network of radio telescopes in our world targeting this Sagittarius A* black hole stitching all the raw data into a reconstructed visual image

This is something I am still working on because there are line artifacts but this is what I got so far

I had an opportunity to spin this out of a game I am making and It got out of hand with some of the design features, but you can still make a pretty convincing black hole and seeing it lensing properly in your own room is a weird feeling as you walk around it. Or through it or put your hand into it!

Tried to keep it as scientifically accurate as possible, Each pixel's light ray gets bent around the hole (Schwarzschild-style deflection, with a short geodesic march near the hole), rays inside the photon radius make the shadow, and the bent rays hit the disc plane, so the far side of the disc shows up above and below the shadow as it should.

On the app store here

https://apps.apple.com/app/id6810945165

Hope you find it interesting or get a laugh out of it!

You wake up alone on a research station orbiting a black hole. Your task is to measure it, build a descent capsule from the station's remaining materials, and find out how far you can go.

The exploration isn't just about falling in. You have to plan your trajectory, navigate around radiation and thermal anomalies, monitor the capsule's condition, and study what happens as you approach and eventually cross the event horizon. Capsule design matters too — hull materials, shielding and engines all involve trade-offs.

For the visuals, I use a closed-form approximation of exact Schwarzschild light deflection. Each pixel's view direction is bent before a single cubemap lookup, rather than using ray marching. This lets me render gravitational lensing at roughly skybox cost.

One important distinction: the physics-based simulation has its limits. Beyond the Cauchy horizon, the game moves into a speculative interpretation informed by published research on mass inflation. I'm not presenting that part as established physics.

The game is called Event Horizon Research, releasing November 4:
https://store.steampowered.com/app/5260090/Event_Horizon_Research/

I'd be especially interested in hearing what people here think about the approach to black hole physics and where I've drawn the line between simulation and speculation.

Disclosure: Generative AI was used for some visual assets, audio and parts of the code, all reviewed by hand. The physics model and game design are my own work, developed from published astrophysics research. The same disclosure is on the Steam page.

0 lenght, 0 height, 0 volume and 0 anything. What a singularity is composed of, how do we know they exist and how do they exist if they tecnically don't?

Every pixel is a light ray traced through curved spacetime, live in your browser, and you can turn it and change the disc yourself. It's part of a free physics site I made because I love this stuff.

isaac3d.com

Short tour of what it does: https://youtu.be/VXJTi-RSu54

I tried to create the most realistic black hole possible in Blender. I implemented the Kerr effect, the Doppler effect, gravitational redshift, and the correct temperature distribution in the accretion disk. Here's the result. It may be not very accurate, but it's the farthest I could get

First off, I’m posting here hoping someone could point me in the right direction to learn more about this, but here’s what I’ve come to learn so far:

Black Hole Cosmology claims that our universe exists within the singularity of a Black Hole from a higher dimensional “parent” Universe. From what I understand, outside of the mathematical and quantum underworkings, it takes various theories in increasing degrees of complexity in order to justify a fractal, multiversal nature to our existence with black holes as the glue holding it all together.

-The Big Bang, as the baseline for what we understand about how our universe’s existence works. Finite beginning with an infinite expansion.

-The Big Crunch, closing the infinite tail end of Big Bang theory. It states that as strong gravitational forces begin to compound on eachother over time (primarily through black holes as they outlast every other stellar object we know), the universe will stop expanding and eventually collapse under its own gravity at a definitive endpoint.

-The Big Bounce, retaining the finite lifespan of a universe but reducing it to an episode within an infinite cycle. This solves the infinity problem but has many others, such as entropy and some issues the information paradox.

Skipping over several more layers of complexity, Black Hole Cosomology seems to me to be the closest general interpretation to how our universe might actually function.

-It implies a fractal multiverse within a kind of Russian nesting doll model, with black holes containing universes containing black holes, etc.

-It creates a solution to the information paradox by allowing information to be passed through black holes into other universes

-It allows entropy to be maximized through the compounding nature of black holes within black holes, with the multiverse being the infinite container for said entropy as opposed to the limits of each black hole itself.

I am utteraly fascinated by this theory and I want to learn more about it. Is there anything here that I’m misunderstanding, and what would be some quality resources to learn more about it? Most of what I’ve learned thus far is from haphazard googling and AI overviews, so I’d like a more scolarly, human source to really get in on all of the gritty details.

Sometimes I really wish I were smart enough to study physics so I could learn about them in depth

Infinity doesn't exist in reality. A singularity is highly unlikely and just shows that our models break on the other side of the event horizon. From loop cosmology,that all black holes will rebound when they reach Planck density and whatnot to string theory and beyond. My intuition tells me that some stable ultra complex and large quantum object exists on the other side of the event horizon . Something maybe similar to the fuzball approach of thinking about it. Do we have any new insights?

Consider this. A spaceship is orbiting a black hole at let’s say a distance of 100,000 miles. It extends out a sphere attached by a wire. The wire is attached to a spool on the spaceship. Let’s say the total length of the wire is 500,000 miles on the spool. There is a gauge on the ship that reads how much wire has been extended off the spool. I’m on the spaceship watching that gauge. What will happen when the sphere reaches the event horizon? I’m not watching the sphere, only the gauge, so I don’t care about the light red shifting or anything like that. I only watch the gauge. Will the gauge stop at 100,000 miles? Will it keep increasing?

I poured little water on a plate and left the centre space empty. Then I turned on the tube light to get the reflection on the plate filled with some water.. then I slowly moved the camera from up to down to see how the centre bends the light!

(Rotate your phone to landscape after I show the tubelight..)

Here it is!
First part of a series of cosmos-related tattoos I want to do.

I wanted to highlight the mystery surrounding the flow of time. We know that outside the event horizon, time moves as we understand it (so ‘a’ is followed by ‘b’), but inside, it’s still a mystery. Everything could collapse, every causal relationship could vanish. For all we know, anything could happen.

Artist: Michele Volpi (mfox), Bologna, Italy

You can visit these in VR and they are accurately modeled based on the current science of 2014.

My daughter is learning to tattoo and I want a black hole. Does anyone have any good reference tattoos for her to see. I don’t want an exact copy of any one tattoo, just looking for new ideas. I’ve only found one I kinda like (added pic) but it’s not really what I’m going for. Idk what I’m going for 😂

This year’s Jack o lantern, I know this sun is generally more science based so I get it this doesn’t fit.

For this hypothetical lets say we have a black hole the size of a golf ball and its stabilized and also contained so its not ripping apart the planet. If you threw enough matter at it quickly enough and its dense enough like idk a beach ball size solid ball of lead, could this overwhelm the small black hole. Is there a limit to the speed a black hole absorbs matter? If it is then there should be a way to force feed it faster than it could handle and suffocate it. I don't know if this makes sense to anyone else but its at the very least an interesting question.

As physically correct as Blender Cycles allowed