Initializing, please wait a moment
How to Explore Twilight Types 3D Explorer
Open Twilight Types 3D Explorer, move the depression-angle dial, and watch a bright ring sweep across the civil, nautical, and astronomical twilight bands drawn around Earth's terminator.
- Open https://freetoolonline.com/space-3d/twilight-types.html and wait for the Earth sphere and five twilight bands to render.
- Drag the depression-angle dial from 0 toward 18 degrees and watch the bright ring move from the daylight cap through civil, nautical, and astronomical twilight into full night; the facts panel names the current band.
- Drag the latitude slider to place the green marker at a different latitude's local-midnight point.
- Click "June solstice (N summer)" to see which latitudes get a "white night" - continuous civil twilight with no true darkness.
- Click "Equinox" or "December solstice (N winter)" to see how the same latitude's midnight depression changes with the season.
- Click "Reset" to return to the default view (dial at 6 degrees, latitude 64 degrees North, June solstice).
Key published figures
| Figure | Value |
|---|---|
| Civil twilight | 0-6 degrees below horizon |
| Nautical twilight | 6-12 degrees below horizon |
| Astronomical twilight | 12-18 degrees below horizon |
| White-night threshold latitude (summer solstice) | about 60.5 degrees North or South |
Next: the when guide or vs alternatives. Open the Twilight Types 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.