1. The Sun – Earth - Moon System

2. The Earth–Moon–Sun System
Eclipse
The partial or complete obscuring, relative to a designated observer, of one celestial body by another.

3. The Earth–Moon–Sun System
Ellipse
A curve traced out by a point that is required to move so that the sum of its distances from two fixed points (called foci) remains constant.
If the foci are
identical, the ellipse is a circle
distinct, the ellipse looks like a squashed or elongated circle

4. The Earth–Moon–Sun System
Solar Eclipse
Occur when the moon moves in a line directly between Earth and the sun
Moon is the eclipsing body
Casts a traveling shadow across Earth's lighted surface
Observers along the shadow's path see a total or partial obscuring of the Sun's disk by the Moon's silhouette.

5. Solar Eclipse
Makes no sense without caption in book

6. The Earth–Moon–Sun System
Lunar Eclipses
 Occur when the moon’s orbit of the Moon carries it through Earth's shadow
. Observers see the full Moon dim considerably, but it remains faintly visible.
 During a new-moon or full-moon phase, the moon’s orbit must cross the plane of the ecliptic for an eclipse to take place.

7. Lunar Eclipse
Makes no sense without caption in book

8. The Earth–Moon–Sun System
Umbra
 The completely dark portion of the shadow cast by the earth, moon, or other body during an eclipse.
Penumbra
 A partial shadow, as in an eclipse, between regions of complete shadow and complete illumination.

9. What is a Lunar Eclipse?
What is a Solar Eclipse?