Welcome to Geochron!
Dr. Bob Amey & Dr. James Hayes-Bohanan
Department of Geography
Seasons
What’s wrong with
this picture?
Why the 8?
The orbit is elliptical, not circular.
Earth’s Tilt: 23° 27’
We usually use 23.5°
DECEMBER
MARCH
JUNE
SEPTEMBER
TROPIC OF CANCER
TROPIC OF CAPRICORN
The boundaries of the “tropics”
are determined by this tilt…