Public index · Planetary
Uranus half-cycle
~42 yr
Measured
Half of Uranus’s ~84-year heliocentric period; also the polar day/night
Uranus orbits in ~84.02 years. Half is ~42. A pole sees ~42 years of sun, then ~42 of dark.
What it supports
A planetary clock. Sidereal period is measured; polar seasons follow the 82° tilt.
What it does not
Not a human life-span law. Not the same 42 as Adams or as rainbow 42°.
ExactnessApproximate
Form42 as duration
Unityears
Strengthhard