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Originally posted by Aresh Troxit
reply to post by St-Patrick
Family freaked out when we saw the moon. I told them it was smoke from all the fires around us.
When I tried to take a picture, it reverted to normal, so the moon is slightly orange on pics...
There are few situations that can cause a red moon. The most common way to see the Moon turn red is when the Moon is low in the sky, just after moonrise or before it's about to set below the horizon. Just like the Sun, light from the Moon has to pass through a larger amount of atmosphere when it's down near the horizon, compared to when it's overhead. The Earth's atmosphere can scatter sunlight, and since moonlight is just scattered sunlight, it can scatter that too. Red light can pass through the atmosphere and not get scattered much, while light at the blue end of the spectrum is more easily scattered. When you see a red moon, you're seeing the red light that wasn't scattered, but the blue and green light have been scattered away. That's why the Moon looks red. The second reason for a red moon is if there's some kind of particle in the air. A forest fire or volcanic eruption can fill the air with tiny particles that partially obscure light from the Sun and Moon. Once again, these particles tend to scatter blue and green light away, while permitting red light to pass through more easily. When you see a red moon, high up in the sky, it's probably because there's a large amount of dust in the air.