penumbral lunar eclipse

A penumbral lunar eclipse occurs when the Earth passes between the Sun and the Moon, but only the outer shadow of the Earth (the penumbra) falls on the Moon. This causes the Moon to appear slightly darker or shadowed, but not completely obscured, as in a total or partial eclipse. The change is subtle and often difficult to notice with the naked eye. It happens gradually and can last for several hours. Essentially, the penumbral lunar eclipse is a gentle dimming of the Moon’s surface, caused by Earth's partial shadow, offering a quiet, less dramatic eclipse experience.