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Questions and Answers
What is the most prominent astronomical object in the sky besides the Sun?
What is the most prominent astronomical object in the sky besides the Sun?
The Moon
Why do the Sun and the Moon appear to have the same angular size in the sky?
Why do the Sun and the Moon appear to have the same angular size in the sky?
Although the Sun is about 400 times larger in diameter than the Moon, it is also about 400 times farther away, so both the Sun and the Moon have the same angular size of about 1/2°.
What is the name of the darkest part of the shadow cast by Earth or the Moon?
What is the name of the darkest part of the shadow cast by Earth or the Moon?
The umbra
What is the name of the lighter, more diffuse region of darkness in the shadow cast by Earth or the Moon?
What is the name of the lighter, more diffuse region of darkness in the shadow cast by Earth or the Moon?
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What happens when the Moon's shadow strikes Earth?
What happens when the Moon's shadow strikes Earth?
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What happens when the Moon passes into the shadow of Earth?
What happens when the Moon passes into the shadow of Earth?
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