Observing planner · engine.liveSky.twilight
Twilight Planner
The civil, nautical, and astronomical twilight times for a given place and date — when true darkness begins and ends. Computed from the Sun's position.
Highlights
- ›Civil, nautical & astronomical twilight
What it draws on
Across the suite
Knowledge connections
- Associated withThe Sun
- Associated withDarkness Planner
- Associated withDarkness Planner
Sources
The primary and reference sources this topic draws on.
- NASANational Aeronautics and Space Administration
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.