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solar eclipse 
Obscuration of the Sun brought about by the passage of the Moon between Earth and the Sun.
Moon
Natural satellite of Earth.
Sun
Light source eclipsed by the Moon.
Moon’s orbit
Elliptical path of the Moon revolving around Earth under the effect of gravitation.
Earth
Third planet from the Sun, Earth takes a full day to rotate once on itself, one year to revolve once around the Sun.
umbra shadow
On Earth, the observer in this region will see a total or annular eclipse.
penumbra shadow
On Earth, the observer in this region will see a partial eclipse.
Earth’s orbit
Elliptical path of Earth revolving around the Sun under the effect of gravitation.
