Initializing, please wait a moment
How to explore Hill Sphere 3D Explorer
Open the Hill Sphere 3D Explorer, read r_H ~= a (m/3M)^(1/3) with Earth ~1.5 million km, then confirm the Moon at ~384,400 km sits inside the teal shell.
- Open https://freetoolonline.com/space-3d/hill-sphere.html and wait for the teal Hill shell.
- Read the facts panel: formula, 1.5 million km, 384,400 km, 60,000 km.
- Press Earth and Jupiter to compare shell size.
- Toggle the moon and the moon's own Hill shell.
- Compare with Roche Limit 3D for tidal breakup, or Lagrange Points 3D for L1-L5.
Hill sphere key figures
| Body | Hill-sphere figure |
|---|---|
| Earth Hill radius | ~1.5 million km |
| Moon orbital distance | ~384,400 km |
| Moon's own Hill radius | ~60,000 km |
Next: the when guide or vs alternatives. Open the Hill Sphere 3D Explorer.
Why trust these tools
- Ten-plus years of web tooling. The freetoolonline editorial team has shipped browser-based utilities since 2015. The goal has never changed: get you to a working output fast, without an install.
- No install, no sign-up. Open a tool and get a working output in seconds - nothing to download and no account to create. Tools that need heavy processing run it on our service, so even a low-powered machine gets the job done.
- Analytics stops at the page view. We measure which pages get visited, not what you type or upload inside a tool. There is nothing to sign in to and no profile is attached to your input.
- Open-source core components. The processing engines underneath (libheif, libde265, pdf-lib, terser, clean-css, ffmpeg.wasm, and others) are public and audit-able. We link to each one in its tool page's footer.
- Free, with or without ads. All tools are fully functional without sign-up. The Disable Ads button in the header is always available if you need a distraction-free run.