The celestial event that occurs when the Earth passes between the sun and the moon is called a lunar eclipse. During this phenomenon, the Earth's shadow obscures the moon, preventing sunlight from reaching it. Lunar eclipses can be total, partial, or penumbral, depending on how much of the moon is covered by the Earth's shadow. Total lunar eclipses often result in a reddish hue on the moon, sometimes referred to as a "Blood Moon." These events can be observed without special equipment and are viewed as exciting astronomical occurrences by many people around the world.