# How does earth's orbit affect climate?

Jul 18, 2016

The Earth's spin axis revolves around the the normal to Earth's orbital plane, once in a year. This changes latitude-wise the hemispherical surface facing the sun, during a year.

#### Explanation:

The obliquity (day/night spin) axis is inclined at ${23.4}^{o}$ to the

normal to the ecliptic ( the Earth's orbital plane).

Despite that this angle is steady, this axis revolves about the normal,

once in a year.

This turning is relative to the Sun, and so, creates

seasons.

The turning is gradual and periodic, with period the orbital

period one year.

In effect, the angle of incidence of solar rays changes within the

limits $l a t i t u \mathrm{de} \pm {23.4}^{o}$.