Obscuring of one celestial body by another, either by direct superposition or by the casting of a shadow. Solar eclipses are of three kinds, total (when the Moon completely eclipses the Sun), annular (when a complete ring of sunlight escapes around the edge of the Sun), and partial. Lunar eclipses are of two types, total and partial.

Some or all content above used with permission from J. H. Wittke.

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