EASA NAV(A)basic
Which statement about Earth's polar axis is correct?
Answer
It crosses the geographic poles and is perpendicular to the equatorial plane
Explanation
The rotational axis intersects the **geographic North and South Poles** and is at 90° to the equatorial plane. The 23.5° figure describes Earth's axial tilt relative to the perpendicular to the ecliptic, not the stated relationship. **Key takeaway:** The polar axis is perpendicular to the equator. **Glossary:** Equatorial plane: plane containing the equator.
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