Which celestial body is NOT involved in the occurrence of a lunar eclipse?

A lunar eclipse occurs specifically when the Earth passes between the Sun and the Moon, casting a shadow upon the Moon. This alignment involves the Sun, the Earth, and the Moon, as the Sun's light is blocked by the Earth. During this event, the Moon becomes darkened or takes on a reddish hue due to the bending of light through the Earth’s atmosphere.

Venus, while a planet that orbits the Sun, is not part of this process. It does not play a role in the alignment required for a lunar eclipse. The participation of Venus would not create any shadowing effect on the Moon, as its position relative to the Earth and the Sun does not impact the occurrence of lunar eclipses at all.

Understanding this helps clarify that while the Sun, Earth, and Moon are all essential components in the phenomenon of a lunar eclipse, other celestial bodies like Venus do not influence this particular event.