The "Blood Moon" refers to a total lunar eclipse where the Moon takes on a reddish hue. This phenomenon occurs when the Earth positions itself directly between the Sun and the Moon, casting a shadow on the lunar surface. The red color is a result of sunlight filtering through Earth's atmosphere, scattering shorter blue wavelengths, and allowing longer red wavelengths to reach the Moon.¹
*Key Facts About Blood Moon:*
Cause of Red Color*: The Moon's reddish appearance is due to Rayleigh scattering, where shorter wavelengths of light are filtered out, and longer wavelengths like red and orange pass through.
The Blood Moon is visible from anywhere on the Earth where the Moon is above the horizon during the eclipse.
The total phase of a lunar eclipse can last from tens of minutes to over an hour.
Frequency*: Total lunar eclipses occur about every 2.5 years at any one location, with 1 to 3 lunar eclipses happening annually.²
Recent and Upcoming Blood Moons:*
Recent Blood Moon*: A Blood Moon occurred on September 7-8, 2025, visible across Asia, Australia, Africa, and Europe.
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