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A solar eclipse is when the earth's moon passes between the sun and the earth to block the view of the sun on the earth.  A lunar eclipse is when the moon passes through the shadow of the earth when the earth comes between the sun and the moon.  A total eclipse completely blocks the view while a partial eclipse justs covers a portion of the viewed object.

A solar eclipse is when the earth's moon passes between the sun and the earth to block the view of the sun on the earth.  A lunar eclipse is when the moon passes through the shadow of the earth when the earth comes between the sun and the moon.  A total eclipse completely blocks the view while a partial eclipse justs covers a portion of the viewed object.

[[File:Solar eclipse types.svg.png|300px|thumb|left|Sun-moon configurations that produce a total (A), annular (B), and partial (C) solar eclipse]]

[[File:Solar eclipse types.svg.png|400px|thumb|left|Sun-moon configurations that produce a total (A), annular (B), and partial (C) solar eclipse]]

For any two objects in space, a series of lines can be drawn to explain what causes an eclipse and to predict how it will been seen at a third point in space.  Typically the cross-section of the objects involved in an astronomical eclipse are roughly shaped like a circle. The region of an object's shadow during an eclipse is divided into three parts:

For any two objects in space, a series of lines can be drawn to explain what causes an eclipse and to predict how it will been seen at a third point in space.  Typically the cross-section of the objects involved in an astronomical eclipse are roughly shaped like a circle. The region of an object's shadow during an eclipse is divided into three parts: