A lunar eclipse is a phenomenon occurring when the Earth casts a shadow over the Moon. This happens when the Moon passes directly behind the Earth. When Earth comes between the Sun and the Moon, light is unable to reach the Moon directly, and the Earth’s shadow is cast on the Moon.
There are three types of lunar eclipses: Total eclipse, partial eclipse, and penumbral eclipse. In a total lunar eclipse, the shadow of the Earth covers the Moon completely.
A partial lunar eclipse happens when Earth comes between the Sun and Moon, but the three do not align in a straight line, and only a small part of the Moon’s surface is covered.
In a penumbral lunar eclipse, the Moon is in the Earth’s shadow (penumbral). It is usually pale that you might not notice the Earth’s shadow on the Moon.