Here is a bit of info... an exerpt from the Salt Lake Tribune:
'Ring of Fire' eclipse puts on a show for southern Utah crowds
"Such an eclipse can occur multiple times a
year, but it can only be seen from a small portion of the planet. The
last annular eclipse visible from the United States was in January 1994,
and the next one won’t happen until Oct. 14, 2023, Wiggins said.
The eclipse happens only during a new moon,
when the illuminated side of the moon is facing away from the Earth. It
doesn’t happen frequently because the moon’s orbit is tilted, so it is
often below or above the Earth.
The difference between an annular eclipse and a
full eclipse depends on how far from Earth the moon is as it
makes its elliptical orbit. When the moon is closer to the Earth, it blocks
only about 90 percent of the sun, causing an annular eclipse. In the Salt Lake City, eclipse watchers could
see what is called a deep partial eclipse, when the sun becomes a
crescent as the moon passes in front of it."http://www.sltrib.com/sltrib/news/54150685-78/eclipse-moon-solar-annular.html.csp
By SHEENA McFARLAND and Brennan Smith| The Salt Lake Tribune

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