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Annular Solar Eclipses are Rare SpectaclesĪn annular eclipse's brilliant "ring of fire" is only visible for a brief period of time, ranging from a fraction of a second to more than 12 minutes. "As the pair rises higher in the sky, the silhouette of the Moon will gradually shift off the sun to the lower left, allowing more of the Sun to show until the eclipse ends," NASA said per Comicbook. First, the moon must be in its first lunar phase and farther away from Earth in its elliptical orbit, making it appear smaller in the sky than usual.īecause the moon seems smaller in these conditions, it cannot wholly hide the sun out, resulting in a "ring of fire" or "ring of light." However, the moon does not entirely hide the sun during an annular solar eclipse, leaving a bright ring of sunlight visible.Īn annular eclipse can only happen under certain circumstances. What is an Annular Solar Eclipse?ĬNBC (via MSN) said a total solar eclipse occurs when the moon passes squarely between the Earth and the sun, covering the sun's light completely. Millions of people are expected to watch as the eclipse cuts a path of totality 70 miles wide across the United States from Oregon to South Carolina on August 21. Although much of it was covered by a cloud, with approximately 2 minutes 40 seconds of totality, the area in Southern Illinois experienced the longest duration of totality during the eclipse.
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CARBONDALE, IL - AUGUST 21: The moon eclipses the sun above the campus of Southern Illinois University on August 21, 2017, in Carbondale, Illinois.