penumbra

A lunar eclipse happens when the Moon passes through the outer region of the Earth's shadow called the penumbra.

The lighter one, called the penumbra, will not have too much effect but the umbra, the inner and darker shadow, will darken the Moon.

Eastern time on Monday, the moon will start to pass through only the outermost part of Earth’s shadow, known as the penumbra.

The penumbra of Broadway stardust she radiated accumulated over decades.

While lit with the penumbra of a spotlight aimed elsewhere, he coolly mimed the smoking of a cigarette with a kazoo.