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Lunar Eclipse to Darken Moon over North, South America

FILE - The supermoon passes behind the top of Washington Monument during a lunar eclipse on Sept. 27, 2015. People in many parts of North and South America will be able to see a total lunar eclipse Sunday night, Jan. 20, 2019 and early Monday morning.
Lunar Eclipse to Darken Moon over North, South America
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People in many parts of North and South America will be able to see a total lunar eclipse Sunday night and early Monday morning.

A lunar eclipse happens when the moon passes through Earth’s shadow as our planet goes around the Sun. This kind of event does not happen every year. The last lunar eclipse seen in the United States took place in September 2015.

The eclipse this weekend is special. The moon will be a little closer than it normally is to the Earth. For this reason, it will appear brighter than usual. Such a moon has come to be called a supermoon.

Astrophysicist Patrick Hartigan told the Associated Press, “It not only is a supermoon and it’s a total eclipse, but the total eclipse also lasts pretty long. It’s about an hour.” Hartigan works at Rice University in Texas.

If skies are clear, the total lunar eclipse also will be partly visible in western Europe. It will be fully visible in Greenland and Iceland.

When the moon is completely eclipsed, it looks darker and appears to have an orange or even a red color. That is because the reduced amount of sunlight which reaches the moon is scattered by the Earth’s atmosphere. A sunset on Earth looks orange for a similar reason.

Because of its reddish color, an eclipsed moon is sometimes called a blood moon.

In North America, there are traditional names given to each of the 12 full moons that happen throughout the year. January’s full moon is known as the wolf moon or the great spirit moon. So this weekend’s eclipse is being called a super, blood, wolf moon by some people.

The eclipse will begin shortly after sunset in eastern North America and South America depending on where you are. A total lunar eclipse can be seen easily with the unaided eye.

Hartigan said, “It’s just a wonderful thing for the whole family to see because it’s fairly rare to have all these things kind of come together at the same time.”

While the moon, Earth’s only natural satellite, will be closer than usual, it still will be 357,000 kilometers away from our planet. This will be the first of three full-moon supermoons this year.

The next total lunar eclipse visible anywhere in the world will not happen until May 2021.

I’m Mario Ritter Jr.

Mario Ritter adapted this AP story for VOA Learning English. George Grow was the editor.

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Words in This Story

lunar – adj. related to the moon

eclipse – n. an event in which either the sun is hidden by the moon or the moon is hidden by the Earth’s shadow

shadow – n. an area of darkness created when a source of light is blocked

scatterv. to divide into small parts or pieces; to cause to separate widely