Earth & Venus Visibility

Inspect where the Sun and Venus sit over Earth plus a quick heliocentric sketch.

• Plot one custom lat/lon point with highlight rings.
• Inspect subsolar and sub-Venus points with day-side visibility overlays.
• Scrub date/time or jump by sidereal days to animate footprints.
• Toggle Sun/Venus overlays and view numeric subpoint readouts.
• Enable sun-synchronous camera to track the subsolar point.
• Use terminator view to stay centered on the dawn/dusk line.
• Show twilight bands with a configurable sun-below-horizon angle.