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How to Explore Saros Cycle Eclipse Explorer 3D

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Open the Saros Cycle Eclipse Explorer 3D, step through the series with the slider or Play stepping, and watch each eclipse's ground track march about 120 degrees west of the last.

  1. Open https://freetoolonline.com/space-3d/saros-cycle.html and wait for Earth to render.
  2. Drag the eclipse-index slider from 0 to 1 and watch the bright track shift about 120 degrees west of the dim starting track.
  3. Press "Show all tracks so far" to see every step in the series at once, marching westward together.
  4. Press "Jump 3 steps (exeligmos)" to watch the track return near its starting longitude after three steps.
  5. Press "Play stepping" to run automatically through the whole series.
  6. Read the facts panel for elapsed time, cumulative westward shift, and how long a full series lasts.

Key published figures

FigureValue
Saros period6,585.32 days = 18 years 11 days 8 hours
Shift per eclipseabout 120 degrees west
Exeligmos (triple saros)54 years 34 days
Series length69-87 eclipses, about 1,226-1,550 years

Next: the when guide or vs alternatives. Open the Saros Cycle Eclipse Explorer 3D.

Reviewed by the Free Tool Online editorial team · Tested in the current versions of Chrome, Firefox, Safari, and Edge before publishing. No account is needed to use any tool. Report a bug - we triage within 72 hours. · Last refreshed April 2026.

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