About

Tangible Cosmos is a free, interactive science classroom where the core ideas of modern physics and cosmology are met not just by reading, but through real-time simulations you can touch and control.

What makes it different

Every figure here is not a pre-rendered image — it is the result of your own browser solving the physics equations live, right now. The gravity of the three-body problem, light bending around a black hole, quantum interference in the double slit — move the sliders, press the buttons, and watch the principles come alive before your eyes.

What's inside

Five parts and sixteen chapters (the three-body problem, chaos, relativity, black holes, the Big Bang, dark matter, the life of stars, quantum mechanics, the Standard Model, string theory, exoplanets, the Drake equation, and more). Each chapter has an in-depth explanation, key equations, a quick quiz, and a hands-on challenge. Available in Korean and English.

Why it was made

It is an experiment in making complex physics intuitively touchable. It was built by one person using nothing but plain web technology (HTML, CSS, JavaScript) and the browser canvas — no frameworks, no game engine.

On accuracy

Because the goal is to help a general audience understand science, some material is simplified to convey complex ideas intuitively, and it does not guarantee academic or technical precision. For exact details, please consult textbooks or specialized literature.

Contact & bug reports

If you find an error or have a suggestion, please reach out at [email protected]. Your feedback makes the content more accurate.