Equinox East-West Sunrise Check

• clear horizon at sunrise or sunset
• compass app or bearing reference
• date near an equinox

1. Observe sunrise or sunset within a few days of the March or September equinox.
2. Mark the horizon direction of sunrise or sunset as carefully as practical.
3. Compare the observed direction with due east or due west.

This visual shows the core geometry the experiment is testing before the real-world observation is made.

• The Sun rises close to east and sets close to west around the equinox.
• The direction shifts northward or southward away from those dates in the expected seasonal pattern.
• The pattern is global solar geometry, not just a local lighting effect.

This is a simple seasonal astronomy check that fits a tilted globe and predictable solar declination.

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