Earth Sun/Moon Subpoints & Twilight Viewer

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Earth Simulator

An interactive globe with subsolar/sublunar points, time controls, and great-circle measurements between two locations.

  • Plot two custom lat/lon points with highlight rings.
  • Trace the great-circle route between points with distance and initial heading.
  • Inspect subsolar and sublunar points with day/night overlays.
  • Scrub date/time or jump by sidereal days to animate footprints.
  • Toggle night/Moon overlays and view numeric subpoint readouts.
  • Use sun-sync or terminator camera modes to follow the daylight edge.
  • Show twilight bands with a configurable sun-below-horizon angle.

FAQ

How do I compare two locations? Enter Point A/B or click the globe; the great-circle path shows distance and initial heading.
How do I keep the view aligned with daylight? Use Sun-sync, Dawn, or Dusk camera modes to follow the subsolar point or terminator line.
Can I toggle overlays? Use Twilight Band to set the horizon offset and the Night visibility checkbox to enable/disable the night overlay.

Interesting dates

99% of population see sunlight
Add a short description here.
Sun over Makkah (solar zenith)
Local time in Makkah (UTC+3). Buttons jump to UTC.
Texture map credit: Solar System Scope

Time & Animation

Sun & Moon

Camera

Twilight Band

Points

Sun & Moon Data

Subsolar
Sublunar