EASA NAV(A)basic
2. Which statement about the Earth's polar axis is correct?
Answer
It crosses the geographic poles and is perpendicular to the equatorial plane
Explanation
The polar axis is perpendicular to the plane of the equator. The 23.5° figure describes Earth's axial tilt relative to the ecliptic, not its angle to the equatorial plane. **Key takeaway:** The rotation axis is normal to the equator. **Glossary:** Equatorial plane: plane containing the equator.
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