The Atlanta Journal-Constitution
Part of world sees longest lunar eclipse this century
JOHANNESBURG — Skywatchers around much of the world enjoyed a lunar eclipse Friday that is the longest of this century.
The so-called “blood moon,” when it turns a deep red, is visible at different times in Australia, Africa, Asia, Europe and South America when the sun, Earth and moon line up perfectly, casting Earth’s shadow on the moon.
The total eclipse lasted 1 hour and 43 minutes, with the entire event lasting closer to four hours.
Across Africa, people turned to the sky, watching the reddish shadow slide up the moon’s surface. In Somalia, some hurried to mosques for special prayers often observed during lunar eclipses. In South Sudan, some dared to take photos in a war-torn country where using a camera in public is discouraged.
In Ethiopia’s capital, Addis Ababa, people at an openair restaurant admired a rare clear view during the rainy season, comparing a live NASA webcast to what they saw above. Then clouds rolled in.
“Dem yelebesech chereka,” some murmured — Amharic for “blood moon.”
“The reason that the moon turns red is because atmospheric scattering causes red light to pass through the atmosphere and the composition of the atmosphere can change if volcanic eruptions or forest fires occur,” said Tom Kerss, an astronomer with the Royal Observatory Greenwich.
“And the density of dust increasi n g in t he atmosphere can cause the moon to appear a particularly deep red, and indeed it has the same effect on our sunsets and sunrises.”