When the moon passes through the penumbra of Earth's shadow, it is called a penumbral lunar eclipse. However, this is not one of the options provided. From the given choices, the most appropriate answer would be 'partial lunar eclipse', although this technically refers to the event when the moon passes through both the penumbra and the umbra (the darker, central part) of the Earth's shadow to some extent, not the penumbra alone. None of the other options correctly describe the moon passing solely through Earth's penumbra.
