In 2019, skywatchers in a few select locations on Earth will have three
opportunities to see a solar eclipse, a celestial event in which the
moon briefly appears to take a bite out of the sun.
A solar eclipse occurs when the disk of the moon appears to cross in
front of the disk of the sun. A total solar eclipse — like the one that
crossed the U.S. on Aug. 21, 2017 — occurs when the disk of the moon
blocks 100 percent of the solar disk. A partial eclipse occurs when the
moon covers only part of the sun. If the moon passes directly in front
of the sun when it is near apogee, the point in its elliptical orbit
where it is farthest from Earth, skywatchers will see an annular
eclipse, also known as a "ring of fire."[...]
https://www.space.com/33784-solar-eclipse-guide.html
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Eduardo
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