A lunar eclipse can *only* occur during a full moon.
Here's why:
* Lunar Eclipse Basics: A lunar eclipse happens when the Earth passes directly between the Sun and the Moon, casting Earth's shadow on the Moon.
* Full Moon Alignment: A full moon occurs when the Sun and Moon are on opposite sides of the Earth. This is the *only* time when the Earth can be positioned between the Sun and Moon to cause an eclipse.
Therefore, while a full moon is a necessary condition for a lunar eclipse, it is not a guarantee.
The Earth's orbit and the Moon's orbit aren't perfectly aligned. For a lunar eclipse to happen, the full moon needs to be positioned within the Earth's shadow cone.
