Show HN: A browser-based, physically accurate black hole for your room

A Hacker News “Show HN” submission points to blackhole.plav.in, an interactive demo that renders a black hole billed as physically accurate and placeable in the viewer’s own space — language that suggests an augmented-reality or WebXR experience running in the browser. “Physically accurate” typically implies the simulation models effects like gravitational lensing and the distortion of light around the event horizon rather than a decorative animation, though the submission itself provides only the headline and the link.

The post is a personal project shared for feedback, in the tradition of Show HN launches where developers demo interactive graphics, WebGL, and AR experiments. Its appeal is less about a product and more about the technical craft of doing relativistic ray-tracing well enough to run live on consumer hardware and mobile devices.

Beyond the title and URL, no further detail was supplied in the source, so specifics about the rendering technique, platform requirements, or whether the code is open are not confirmed here.