Penumbral lunar eclipse takes place when the Moon moves through the faint, outer part of the Earth's shadow_the Sun, Earth and Moon align in an almost straight line.
The Earth blocks some of
the Sun's light from directly reaching the Moon's surface, and covers a
small part of the Moon with the outer part of its shadow, also known as
the penumbra. The rest receives direct sunlight and can be as bright as a full Moon.. This type of eclipse is often
mistaken for a normal full Moon and is hard to differentiate between the two.