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staedtler staedtler
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7 years ago
Why are some solar eclipses annular (with all but an annular ring of the Sun obscured) rather than total (the whole Sun obscured)?

(a)   The Moon's orbit is elliptical and occasionally the Moon is too far away for the umbra of its shadow to reach the Earth's surface.
(b)   The Moon's shadow passes just north or south of Earth, causing only an annular ring eclipse.
(c)   The Earth is sometimes further away from the Sun such that the Moon's angular diameter is less than that of the Sun at this time.
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Discovering the Universe

Discovering the Universe


Edition: 7th
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staedtler Author
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6 years ago
Person Raising Both Hands in Celebration

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