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🚨 SCIENTISTS MAY HAVE FINALLY SOLVED ONE OF THE BIGGEST UNSOLVED PROBLEMS IN BLACK HOLE PHYSICS. For years, astrophysicists have struggled with the “final parsec problem”: even after two supermassive black holes get relatively close, they struggle to shed enough angular momentum to merge within the age of the...

18,359 views • 20 days ago •via X (Twitter)

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At the heart of our Milky Way lies Sagittarius A*, the supermassive black hole with a mass of about 4.3 million suns. Recent observations from the Event Horizon Telescope have revealed something remarkable: the magnetic fields surrounding it are not the turbulent, disordered chaos scientists once expected, but instead form a strong, coherent spiral structure.These organized, twisted magnetic fields thread through the swirling hot plasma near the event horizon, acting like invisible guides that regulate how matter flows inward. They help control the acceleration and heating of gas, determine the intensity of emitted radiation, and stabilize the chaotic environment just outside the point of no return.This discovery, achieved by imaging polarized light from the accretion disk, shows striking similarities to the magnetic geometry seen around the much larger black hole in M87—despite vast differences in size and activity level. It suggests that powerful, ordered magnetic fields are a universal feature of supermassive black holes, playing a central role in how they feed, influence their surroundings, and potentially launch jets.The findings deepen our understanding of extreme plasma physics under intense gravity, test general relativity in its strongest regime, and highlight the profound interplay between magnetic forces and spacetime itself. Even in our relatively quiet galactic center, these fields reveal a hidden capacity for dynamic, powerful behavior—reminding us that black holes are not just gravitational sinks, but complex engines shaped by electromagnetism on cosmic scales.Future observations promise even sharper views and time-lapse sequences, offering deeper insights into the fundamental processes driving the hearts of galaxies.

Black Hole

30,841 views • 6 months ago

In the summer of 2023, I cold emailed Jensen Huang and asked to capture a NeRF of him at SIGGRAPH. He responded in about an hour and said yes. A radiance field is, in the simplest terms, akin to a 3D photograph. A moment in time, so completely reconstructed that you can move through it and see it from angles the original cameras never occupied. NeRFs were the original method. Gaussian splatting, which debuted at that same SIGGRAPH, has since become the dominant form of radiance field. I called my late friend James, who told me we needed to begin practicing immediately. We ran capture after capture for weeks until we consistently got the capture time down to ~30 seconds with one camera. Later, in a hallway at the LA Convention Center during SIGGRAPH, I captured the portrait you're seeing now, a full 360° gaussian splat of Jensen, rendered here as a 2D flythrough. Afterward, I continued the conversation with him and members of his team to make the case for radiance fields as a foundational representation for imaging. To my surprise, they listened. Three years later, NVIDIA has several works, including NuRec, fVDB, 3DGRUT, and gsplat all utilizing radiance fields. The landscape has evolved enough that the reasoning is obvious. Gaussian splatting has begun to ship across some of the world’s largest industries, including autonomous vehicles, AEC, geospatial, media and entertainment, robotics, e-commerce, hospitality. It’s become clear that lifelike 3D is here to stay. And yet I think we will look back and be disappointed by how late we started taking 3D portraits of the people around us, just like how we have sparse 2D photos of our grandparents and great grandparents. We have billions of photographs of the people we know and love, but almost no radiance fields of them. I'll be returning to SIGGRAPH in LA where this was initially captured three years ago, with the landscape looking significantly different. Radiance fields are more under deployed than ever relative to what they can do. I'm excited for the future of imaging, and for 2D to transition into 3D. I have a few things up my sleeve that I think will make that case plainly.

Radiance Fields

17,663 views • 24 days ago