Axial Tilt Axial tilt, the second of the three Milankovitch Cycles, is the inclination of the Earth's axis in relation to its plane of orbit around the Sun.
(the second of the three Milankovitch Cycles; is; the inclination of the Earth's axis in relation to its plane of orbit around the Sun)
the second of the three Milankovitch Cycles
is
the inclination of the Earth's axis in relation to its plane of orbit around the Sun