Lunar Eclipse

This diagram explains the geometry of the lunar eclipse. 

When the moon is entirely in the Earth’s umbra (known as a total lunar eclipse or umbral eclipse), all sunlight reaching the lunar surface has been refracted or scattered through Earth’s atmosphere. When the moon is in the Earth’s penumbra (known as a penumbral eclipse), illumination comes from both direct sunlight and sunlight refracted and scattered through the planet's atmosphere. This is similar to an exoplanet transit observation.


ESA/Hubble, M. Kornmesser

About the Image

Release date:6 August 2020, 16:00
Related releases:heic2013
Size:10513 x 6106 px

About the Object

Type:Solar System : Sky Phenomenon : Eclipse : Lunar : Total
Solar System

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