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Lunar EclipseWhen the Moon is opposite the Sun, the side of the Moon we see is fully lit. If the Full Moon then enters Earth’s shadow, we see an eclipse of the Moon. Lunar eclipses don’t happen at every Full Moon. Most months the Moon’s tilted orbit takes it above or below Earth’s shadow. But at least twice a year the Full Moon enters part of our planet’s shadow. Every 18 months or so, the Full Moon enters Earth’s dark shadow completely. The half of the planet where it is night can see a total eclipse of the Moon.
Even with the Moon totally eclipsed, it is still visible, glowing red. Sunlight passing through our atmosphere is still able to reach the Moon, but only the red light. Blue light is scattered by our atmosphere, but longer red wavelengths are bent into the shadow. We are seeing the Moon lit by all the sunrises and sunsets around our planet. This scene is taken at Lyaylik, Uzbekistan on August 7, 2017 by Kwon O-Chul, Jeong ByoungJun.
With the Moon now completely in shadow, the Moon turns red. With its light dimmed, the stars and the spectacular Milky Way appears. This scene is taken at Uyuni, Bolivia on May 15, 2022 by Kwon O-Chul. |
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