![]() The corona is normally obscured by the bright face of the Sun.Ī similar phenomenon, an annual solar eclipse, occurs when the moon appears slightly smaller than the sun, failing to completely block it out and leaving a so called 'annular ring' around it at the moment of greatest eclipse. Viewers see the sky become very dark, just as if it were dawn or dusk, while it may also be possible to glimpse the sun's corona, or outer atmosphere, around the moon. There are various types, depending on how much of the Sun appears to be obscured to a viewer in a given location.įor a total solar eclipse - when the sun is temporarily fully obscured by the moon for those in the very centre of the lunar shadow - all three of the celestial bodies must be in a direct line. ![]() ![]() Solar eclipses occur when the moon passes between the Earth and the sun, casting a shadow on the Earth.
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