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Solar System

Sun A-Z

Annular eclipse   A solar eclipse that occurs when the Sun and the Moon are exactly in line, but when the Moon—as seen from Earth—is smaller than the Sun. The apparent size of the Sun and Moon changes slightly through the year since there are times when Earth is slightly nearer or farther away from them. As a result, the Sun appears as a bright ring, called an annulus, around the black disc of the Moon.

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