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Causes Lunar and Solar Eclipses
When one celestial body blocks light from or to another, an eclipse occurs. The Moon moves into the shadow formed by the Sun on Earth during a lunar eclipse.
In a penumbral eclipse, the Moon passes into the outer section of Earth’s shadow the penumbra, where the Sun’s light is only partially extinguished—the Moon dims just a little.
When the Moon travels through the umbra, the core section of Earth’s shadow where the Sun’s direct light is entirely blocked, the lunar eclipse is classified as partial if the Moon is partially within it or total if the Moon is completely within it.
The Moon passes between Earth and the Sun during a solar eclipse, blocking part or all of the Sun’s light from reaching Earth. Solar eclipses are classified into three types. When the Moon crosses in front of the Sun during a partial solar eclipse, the Sun is partially obscured.
The Moon totally covers the Sun during a total solar eclipse. The Moon does not entirely cover the Sun in an annular solar eclipse, leaving the Sun’s edge visible. This fourth form of eclipse occurs when the Moon is farthest from Earth in its orbit and the Earth is closest to the Sun in its orbit, resulting in the Moon’s disc being too tiny to totally cover the Sun’s disc.