The orange and red tints that the Sun and Moon sometimes take on are caused by the particles in the Earth's atmosphere.
When light (or more specifically, packets of light called photons) from an astronomical object passes through the Earth's atmosphere, it scatters off of particles in the latter. It turns out that these particles like to scatter blue light more than they do red light; so "bluer" photons (those with shorter wavelengths) tend to get scattered, and "redder" photons (those with longer wavelengths) pass through. So, astronomical objects look redder from Earth than they would from space, because the redder wavelengths from the objects penetrate the atmosphere better than the bluer ones. Incidentally, this is why the sky is blue: blue light from the Sun is scattered in all directions on its way to the Earth.
But how does this explain the occasional redness of the Moon or the Sun? Your son may have noticed that they always occur when the Sun or Moon is close to the horizon. If you think about it, sunlight or moonlight must travel through the maximum amount of atmosphere to get to your eyes when the Sun or Moon is on the horizon (remember that that atmosphere is a sphere around the Earth). So, you expect *more* blue light to be scattered from Sunlight or Moonlight when the Sun or Moon is on the horizon than when it is, say, overhead; this makes the object look redder. In other words, the Sun or Moon tends to look orange or red when it is rising or setting because that's the time when the light has to travel through the most atmosphere to get to you. The effect is exacerbated when there are thin clouds in front or behind the Sun or Moon: the clouds themselves often glow bright pink as well, because they are so good at scattering blue light.
2007-08-29 03:21:30
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answer #1
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answered by ? 6
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It was a Lunar eclipse. This happens occasionally it's when the Sun,Earth & the Moon are lined up in that order. The sunlight's shadow hitting the moon is what caused it to be red. The next one will be able to be seen on February 21,2008.
2007-08-29 09:15:57
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answer #2
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answered by Anonymous
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Depends where you live.
In highly-polluted locations, the dust and particles in tha air can "dye" the light from the moon.
Otherwise, it was probably a lunar eclipse. The moon moves into the earth's shadow, blocking direct light from the sun (moonlight is actually reflected sunlight).
The only light that then hits the moon has passed around the edges of the earth, and is much dimmer and is a reddish colour, due to the presence of the aforementioned particles in the earth's atmosphere.
2007-08-29 08:23:25
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answer #3
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answered by gribbling 7
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Since it is late in the summer, this is normal. The sky is causing the moon to be red, also this eclipse is also called the Sturgeon Moon.
2007-08-29 08:23:38
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answer #4
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answered by trey98607 7
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The skyline was probably glowing underneath, like a sunset, or sunrise make the moon glow in different colors, mostly purple, or red...
2007-08-29 08:28:59
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answer #5
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answered by Joule 4
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As they said, it's a Lunar Eclipse.
2007-08-29 08:30:08
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answer #6
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answered by Anonymous
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This site explains it all for you.
2007-08-29 10:42:47
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answer #7
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answered by 'Old & Cudley' 7
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