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The Sun – Earth - Moon System

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Presentation on theme: "The Sun – Earth - Moon System"— Presentation transcript:

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?

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