Presentation on theme: "The Sun – Earth - Moon System. Eclipse The Earth–Moon–Sun System The partial or complete obscuring, relative to a designated observer, of one celestial."— Presentation transcript:
Eclipse The Earth–Moon–Sun System The partial or complete obscuring, relative to a designated observer, of one celestial body by another.
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
Solar Eclipse The Earth–Moon–Sun System 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.
Lunar Eclipses The Earth–Moon–Sun System . 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. Occur when the moon’s orbit of the Moon carries it through Earth's shadow
Umbra The Earth–Moon–Sun System A partial shadow, as in an eclipse, between regions of complete shadow and complete illumination. The completely dark portion of the shadow cast by the earth, moon, or other body during an eclipse. Penumbra
What is a Lunar Eclipse? What is a Lunar Eclipse? What is a Solar Eclipse? What is a Solar Eclipse?