Relativistic Black Hole

What it does

Relativistic Black Hole renders a physically accurate black hole visualization in a web browser. The tool uses raytracing to show how gravity distorts light and space near the event horizon. Users can view the simulation in standard browser view, through augmented reality on mobile devices that support WebXR, or in virtual reality with compatible headsets. The visualization demonstrates relativistic effects that occur at extreme gravitational fields.

Who it is for

The tool targets people curious about astrophysics and black hole physics who want an interactive way to see how relativity works in practice. Students and educators might use it to understand gravitational lensing and light bending. The creator notes this is a simplified visualization, so it serves educational and exploratory purposes rather than research-grade work.

Pricing

The site does not show prices.

How it stands out

The main distinction is accessibility combined with physical accuracy. Most black hole visualizations are either simplified animations or locked behind specialized scientific software. This tool runs directly in browsers—no installation required—while still incorporating actual relativistic physics rather than approximations. The inclusion of AR and VR modes lets users experience the visualization in three-dimensional space relative to their environment or in immersive headsets, which is rare for physics simulations. The creator's background as an astrophysicist at Harvard's Black Hole Initiative suggests the underlying physics has been carefully implemented.

What a founder should check

First, verify the WebXR support landscape. The AR and VR functionality depends on browser implementations of WebXR, which still has uneven device and browser coverage. A founder building a competing product should research how many potential users can actually access the AR and VR features versus the standard browser experience.

Second, understand the educational market's needs. While the visualization is accurate, examine whether schools and educators actually adopt interactive physics tools, what their procurement processes look like, and whether they prefer free exploratory tools or paid educational platforms with curriculum integration and teacher support.

Third, assess the long-term moat around this specific use case. The computational challenge of relativistic raytracing may create some defensibility, but the creator's homepage explicitly points to Synchray.jl as a science-grade alternative for serious work. Clarify what prevents users from building their own WebGL-based black hole visualizers or using existing physics engines.