<2>Understanding Total Lunar Eclipses
Total lunar eclipses are a rare and awe-inspiring celestial event that occurs when the Earth passes between the sun and the moon, casting a shadow on the lunar surface.
This phenomenon is caused by the Earth’s shadow falling on the moon, which can only happen during a full moon when the moon is on the opposite side of the Earth from the sun.
Total lunar eclipses are relatively rare because the Earth, moon, and sun must be aligned in a straight line, a phenomenon known as syzygy.
During a total lunar eclipse, the Earth’s shadow has two parts: the umbra, which is the darker inner shadow, and the penumbra, which is the lighter outer shadow.
The umbra is the part of the shadow that falls on the moon’s surface, causing the moon to darken and sometimes take on a reddish hue.
The penumbra is the part of the shadow that falls on the moon’s surface, but is not as dark as the umbra.
Total lunar eclipses can last for several hours, but the total phase, when the moon is completely in the Earth’s shadow,