Obliquity Tilt of the Earth's polar axis as measured from the perpendicular to the plane of the Earth's orbit around the sun.
(Obliquity Tilt of the Earth's polar axis; measured; from the perpendicular to the plane of the Earth's orbit around the sun)
Obliquity Tilt of the Earth's polar axis
measured
from the perpendicular to the plane of the Earth's orbit around the sun