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Twilight Types 3D Explorer vs alternatives
Twilight Types 3D Explorer grades the transition zone into civil, nautical, and astronomical bands and computes the white-night threshold interactively in the browser - a sunrise/sunset calculator wins for one specific date and place; a textbook diagram wins for a fixed printed reference.
| Option | Strength | Access | Trade-off |
|---|---|---|---|
| Twilight Types 3D Explorer (this page) | Interactive depression dial plus latitude/season controls in one 3D scene | Free, in browser | Idealized flat-horizon formula; not a full-precision ephemeris for one specific date |
| Sunrise/sunset calculator | Exact times for one real date and place | Free, many sites | No interactive 3D exploration of the band structure itself |
| Textbook twilight diagram | Fixed printed reference | Textbooks/references | Cannot be scrubbed by latitude or season |
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 |
Start with the step-by-step guide or when to use. Open the Twilight Types 3D Explorer.
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