By how many degrees is the Earth axis tilted relative to the orbital plane?
Answer
23.5 degrees
The Earth axis is inclined at an angle of approximately 23.5 degrees relative to its path around the Sun. This tilt is the primary driver of the changing seasons because it determines how sunlight strikes the surface of the planet throughout the year. As the Earth moves along the ecliptic, this constant axial tilt causes the Northern and Southern Hemispheres to alternately lean toward or away from the Sun, resulting in significant changes in the length of days and the intensity of solar radiation.

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