What happens during a lunar eclipse?

During a lunar eclipse, the Earth comes between the Sun and the Moon, blocking the sunlight that normally illuminates the Moon. This positioning causes the Earth's shadow to fall on the Moon, leading to the phenomenon that can be observed from Earth when the Moon appears to darken or take on a reddish hue. This effect is often referred to as a "blood moon." The alignment is critical; for a lunar eclipse to occur, the Sun, Earth, and Moon must be in a straight line, allowing the Earth's shadow to fully or partially cover the Moon.

Understanding this concept is crucial as it helps grasp not only the mechanics of lunar eclipses but also the broader concepts of celestial navigation, orbits, and the spatial relationships between these three bodies. Observing a lunar eclipse can provide a profound appreciation for the dynamics of our solar system.