How does earth's orbit affect climate?
The obliquity (day/night spin) axis is inclined at
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
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