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Above pictures from Here
Comes the Sun: A Solar/Terrestrial Tutorial
by The Plymouth State College Meteorology Program
Data Services
from the U.S. Naval Observatory Astronomical Applications Department
EARTH SUN RELATIONSHIPS,
THE SOLAR SYSTEM
Central Michigan University
Earth-Sun Geometry
by Dr. Michael Pidwirny
Okanagan University College
Earth-Sun Relationships
and Time
Dr. Mark Francek
Astronomy Page
Earth Viewer; Solar System Live