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Incoming links: Types of Solar Eclipses by NASA
Solar eclipse Created 2026-10-18 Updated 2026-11-05
A solar eclipse occurs when the Moon passes in front of the Sun for an observer on Earth. The same event appears different from different locations: an observer in the umbra sees totality, while an observer in the penumbra sees only part of the solar disk covered.
If the Moon's apparent angular diameter is too small to cover the Sun, the central alignment produces an annular eclipse instead. The comparison is between apparent sizes, which depend on both physical size and Euclidean distance. During totality the normally overwhelming solar disk is hidden, exposing the much fainter solar corona and allowing observations of nearby background stars.[ref]
Types of Solar Eclipses by NASA. Total, annular and partial eclipse sections: apparent size, observer location and the visibility of the corona