How it Works

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How it Works

What is a Lunar Eclipse?

A lunar eclipse occurs when the moon is covered by the shadow of the earth-that is, the earth comes between the sun and the moon, casting the earth's shadow on the surface of the moon. A partial eclipse happens when only a portion of the moon is obscured by shadow. When the entire moon is covered for a period of time, we call that a "total eclipse."

Any cast shadow has a partial area called a penumbra and completely dark area call an umbra. The penumbra has some illumination and some shade, the umbra is complete full shading of an object from a source of illumination.


	Conors Eclipse of the Moon \| home How it Works What is a Lunar Eclipse? A lunar eclipse occurs when the moon is covered by the shadow of the earth-that is, the earth comes between the sun and the moon, casting the earth's shadow on the surface of the moon. A partial eclipse happens when only a portion of the moon is obscured by shadow. When the entire moon is covered for a period of time, we call that a "total eclipse." Any cast shadow has a partial area called a penumbra and completely dark area call an umbra. The penumbra has some illumination and some shade, the umbra is complete full shading of an object from a source of illumination.