a total solar eclipse. People in the penumbra see the moon blocking out only part of the sun. This is called a partial solar eclipse. Caution is advised when viewing an eclipse. Staring at the sun even when part of it is blocked out can harm your eyes. The sun should never be viewed with a telescope or binoculars under any circumstances as it may cause permanent damage to the eyes.
Fig. 9 A solar eclipse.
Fig. 10 The diagram shows how the moon blocks light from the sun during a solar eclipse.
37.7 Lunar eclipses
A lunar eclipse occurs when Earth is directly between the moon and the sun. When this happens Earth casts a shadow on the moon. As a result sections of the moon that are normally illuminated appear to be dark.
Fig. 11 Earth casts a shadow on the moon during a lunar eclipse.
Earth Moon
Fig. 12 The diagram shows how Earth blocks the light of the sun from the moon during a lunar eclipse.
A lunar eclipse occurs when Earth casts a shadow on the surface of the moon.
