Drag to rotate · scroll to zoom · double-click the globe to set the observer anywhere.
Dotted orange line = center of the umbra's path.
Sun–Moon–Earth frames all three bodies — the dark cone behind the Moon is the umbra;
where its tip touches Earth is where the eclipse is total.
(Sun distance and size are compressed for the diagram; its direction, the Moon,
and all shadow geometry are true to scale.)
For the big picture: pick Range: 3 months, the Sun-centered orrery frame, and
play at 1 d/s — the Earth slides along its yearly orbit while the Moon loops around it,
and the shadow cone only sweeps across Earth around new Moon on eclipse day.