: The exact shade of crimson can vary based on dust, smoke, or volcanic ash in our atmosphere; more particles typically lead to a deeper, darker red. Cultural & Mythological Significance
A "Blood Moon" is a non-scientific term for the striking reddish-orange hue the moon adopts during a . This phenomenon occurs when Earth positions itself directly between the Sun and the Moon, casting its shadow (the umbra) across the lunar surface. The Science: Rayleigh Scattering Bloody Moon
: As sunlight passes through Earth's atmosphere, shorter wavelengths (blue and violet) are scattered away by gas molecules. : The exact shade of crimson can vary
The red color is caused by the same physical process that creates red sunrises and sunsets—. The Science: Rayleigh Scattering : As sunlight passes
: The remaining longer wavelengths (red and orange) are bent, or refracted, around the Earth's edges and projected onto the Moon.
Throughout history, the Blood Moon's ominous appearance has inspired diverse cultural interpretations: