What determines the severity of the seasons and is currently about $23.4$ degrees?

Answer

Obliquity of the ecliptic

The obliquity of the ecliptic is the maximum angular distance the Sun reaches north or south of the celestial equator, currently measured around $23.4$ degrees, which dictates the severity of the seasons.

What determines the severity of the seasons and is currently about $23.4$ degrees?

#Videos

The Ecliptic: Crash Course Kids #37.2 - YouTube

astronomyZodiacconstellationsecliptic