Figure 1-24

Three Types of Lunar Eclipses (a) People on the nighttime side of Earth see a lunar eclipse when the Moon moves through Earth’s shadow. The umbra is the darkest part of the shadow. In the penumbra, only part of the Sun is covered by Earth. The inset shows the various lunar eclipses that occur, depending on the Moon’s path through Earth’s shadow. (b) This sequence of nine photographs was taken over a 3-hour period during the total lunar eclipse of January 20, 2000. During the total phase, the Moon has a distinctly reddish color.