# What is obliquity angle?

May 27, 2016

It is the inclination of the planet's polar axis to the normal to the planet's orbital plane.

#### Explanation:

The inclination of the polar axis ( about which a planet spins for day

and night ) to the normal to the orbital plane is called the obliquity of

the planet.

Earth's obliquity is ${23.4}^{o}$, nearly..