Why Is The Sky Blue?
8. Blue Moon
As mentioned already, the sky appears to be black at night due to the lack of light from the sun. We still get some light, however, thanks to the suns light that reflects off the moon and onto Earth. We usually see the moon as a silvery gray coin shining brightly in the blackened sky, but this is not always the case. When a volcanic eruption takes place, it will likely send countless fine particles high up into the atmosphere.
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These particles will cause the red light from the moon to scatter, leaving behind light at the bluer end of the spectrum. This will result in a stunning blue moon, and the same effect can be caused by large forest fires.
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