Lunar eclipse - Wikipedia, the free encyclopedia
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A lunar eclipse is an eclipse which occurs whenever the moon passes behind the earth such that the earth blocks the sun’s rays from striking the moon. This can occur only when the Sun, Earth, and Mo...
en.wikipedia.org/wiki/Lunar_eclipse
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The area (volume) in full shadow is the umbra, the boundary area the penumbra. ... (The graphic is actually inaccurate, since the penumbra doesn't have a constant shadow density, but rather a gradient ranging from shadow to light) ... illustration of umbra/penumbra...
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www.schorsch.com/kbase/glossary/penumbra.html
www.schorsch.com/kbase/glossary/penumbra.html
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This page is a basic introduction and explanation of how lunar eclipses take place. It includes a preview to upcoming eclipses of the Moon. ... Geometry of the Sun, Earth and Moon During an Eclipse of the Moon; Earth's two shadows are the penumbra and the umbra. (Sizes and distances not to scale)
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www.mreclipse.com/Special/LEprimer.html
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There are two parts to these shadows. The umbra is a central cone of darkness which tapers away from the Earth or Moon, whilst the penumbra is an outer cone of partial shadow which diverges instead of tapering.
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www.inconstantmoon.com/cyc_ecl1.htm
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MORE ABOUT SHADOWS: UMBRA and PENUMBRA ... An exciting example of the umbra/penumbra effect occurs during a solar eclipse. The Moon passes between the Earth and the Sun, and forms a shadow on the Earth. Because the Sun is not a point source of light, there will be both umbra and penumbra shadows produced on the Earth.
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www.learner.org/workshops/sheddinglight/highlights/high...
www.learner.org/workshops/sheddinglight/highlights/highlights1.html
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To distinguish umbra from penumbra ... The shadows ... penumbral shadow eclipse penumbra umbra...
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www.edumedia-sciences.com/en/a303-umbra-and-penumbra
www.edumedia-sciences.com/en/a303-umbra-and-penumbra
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Pages devoted to The Shadows and their recorded works as released onto the New Zealand market. John Campbell's Shadows tribute and collection site. ... Penumbra is a state of mind --- no less than a virtual Shadow ... n. Partly lighted shadow on the skirts of a total shadow. ~al a. [L paene almost, umbra shade]
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www.penumbra.co.nz/
www.penumbra.co.nz/
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An explanation of what eclipses are, with images and animations. ... About shadows ... It is important to notice that the shadow is more complicated than just a cone: it actually consists of a darker cone, or umbra, where no sunlight reaches, and a lighter region, the penumbra, where only some of the sunlight is blocked.
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www.scienceu.com/observatory/articles/eclipses/eclipses...
www.scienceu.com/observatory/articles/eclipses/eclipses.html
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Science animation - Improve your understanding about the concept of shadows and how Umbra and Penumbra are formed by this simulation. ... Shadows Umbra & Penumbra - Free interactive simulation...
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www.goalfinder.com/downloads_shadows.asp
www.goalfinder.com/downloads_shadows.asp
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