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What is the major factor that governs whether a solar eclipse is total rather than annular, when ...

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What is the major factor that governs whether a solar eclipse is total rather than annular, when ...

What is the major factor that governs whether a solar eclipse is total rather than annular, when viewed from the center of the eclipse path on Earth?
A)   The altitude of the observing site, because observers on a mountaintop are closer to the Moon and this affects the eclipse geometry
B)   The Earth-Moon distance.
C)   The Earth-Sun distance.
D)   The phase of the Moon; total eclipses occur at new Moon, whereas annular eclipses occur at quarter Moon

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Discovering the Universe

Edition: 7^th

Authors: Kaufmann, Comins

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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein

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