Earth's axial tilt: The imaginary axis about which the Earth rotates is inclined at what angle to the plane of Earth's orbit (the ecliptic)?
Give the standard rounded value used in geography.
Choose the correct angle.
Difficulty: Easy
Correct Answer: 66 1/2°
Explanation:
Given data
Axial tilt (obliquity) ≈ 23.5° from the perpendicular to the orbital plane.
Calculation Angle to the plane of orbit = 90° − 23.5° = 66.5° (≈ 66 1/2°).
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