A Lunar eclipse occurs when the shadow of the earth falls on the moon. It occurs only on full moon day.
Types of Lunar Eclipse:
1. Total lunar eclipse: It occurs when the earth’s shadow (umbra) obscures all of the moon’s visible surface.
2. Partial lunar eclipse: It can be observed only when part of the moon’s visible surface is obscured by the earth’s shadow.
3. Penumbral lunar eclipse: It happens when the moon travels through the partially shaded outer region of the shadow cast by the earth (earth’s penumbra).