A "
blood moon" happens when Earth's moon is in full eclipse. When sunlight passes through the the Earth's atmosphere, it gets refracted towards the Earth's surface, and the colours with shorter wavelength gets scattered and filtered out, while the colours with longer wavelengths passes through the atmosphere. The light is once again refracted towards the fully eclipsed Moon, thus illuminating it in a reddish-orange glow.
When is the next lunar eclipse?
- Jan. 19, 2019: Total eclipse. Visible from North and South America, Europe, Africa.
- July 16, 2019: Partial eclipse. Visible from South America, Europe, Africa, Asia, Australia.
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