Here's your answer. It's called a Blood Moon. It happens when the moon is in the Earths shadow. (A reverse eclipse.) The red comes from the sun light passing through earth's atmosphere and bending to shine on the moon while in the shadow. It's the same thing that causes a red sunset or sunrise. It happens near the time of Halloween often. There is no other time you will see it red. People think of an eclipse as when the moon is between the sun and the earth but it happens the other way too. Sometimes you see a crescent moon with the dark part slightly lit up too. This is caused by Earth shine. Light is then being reflected off earth and onto the dark side. That's cool too.(But not red.) Hope this answers your question.
2006-08-09 14:36:29
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answer #1
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answered by Smart Dude 6
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A red moon can be caused by a total lunar eclipse, when the Sun, Earth and Moon are in complete alignment with the Earth between the Sun and Moon. When the Moon travels into the broad cone of shadow that the Earth casts, it does not become invisible because some sunlight is still deflected towards it by the Earth's atmosphere. The Moon can appear as a dark color, usually a coppery red, orange or brown.
2006-08-09 20:59:31
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answer #2
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answered by Bill M 2
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When a total lunar eclipse occures, the Earth passes between the sun and moon such that it's shadow is cast on the moon. The shadow of the Earth is reddish in color and causes the red moon.
The reason for this is the same reason that sunsets/rises are reddish or pinkish. The sunlight travels through the atmosphere parallel (actually rangent though) to the ground. Sunlight is white light, which is composed of all different wavelengths (colors) mixed together. Each color has a slightly different amount of energy. When the light encounters a medium such as glass or the atmosphere, it bends. Blue light bends, or scatters significantly, and red the least so. When the light has to travel through the thicker portion of the atmosphere, parallel to the ground, the atmosphere acts as a filter and the red light is one of the few wavelengths to make it through.
You can see a website about lunar eclipses here.
http://www.mreclipse.com/Special/LEprimer.html
2006-08-10 23:02:00
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answer #3
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answered by minuteblue 6
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I've actually witnessed this event. It occurs when there are excess levels of hydrogen in the atmosphere. And if you look real close, even the black night sky has a noticeable red tint to it. It doesn't happen too often though. The time I saw it was back in 1989, and I haven't seen it since.
2006-08-10 00:27:39
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answer #4
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answered by gunslinger1881 1
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There is a bible verse that goes something like this: "And God will show great wonders in the heavens. The sun will go black in the day and the moon will be turned to blood......." Everyone says these are eclipses of the sun and moon, respectively.
2006-08-09 21:20:34
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answer #5
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answered by Sciencenut 7
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NASA has a great picture and explanation of this event at the link below:
2006-08-13 17:27:22
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answer #6
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answered by dougdell 4
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