2The Earth–Moon–Sun System EclipseThe partial or complete obscuring, relative to a designated observer, of one celestial body by another.
3The Earth–Moon–Sun System EllipseA 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 areidentical, the ellipse is a circledistinct, the ellipse looks like a squashed or elongated circle
4The Earth–Moon–Sun System Solar EclipseOccur when the moon moves in a line directly between Earth and the sunMoon is the eclipsing bodyCasts a traveling shadow across Earth's lighted surfaceObservers along the shadow's path see a total or partial obscuring of the Sun's disk by the Moon's silhouette.
5Solar EclipseMakes no sense without caption in book
6The 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.
7Lunar EclipseMakes no sense without caption in book
8The 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.