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The word BACK is vary vague. :decision:

It may extend from the nape of the neck

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A hybrid eclipse happens when the distance between the Earth and moon is so finely balanced that the curvature of the Earth comes into play.

Sunday morning, when the moon's disk was beginning to slide in front of the sun in North America, the umbral point was not touching Earth, so it appeared as if the sun was heading toward an annular eclipse.

And for 15 seconds somewhere out over the Atlantic ocean, an annular eclipse actually happened.

Then something spectacular followed. As the eclipse progressed, the curvature of the Earth actually reached up to intercept the point of the moon's umbra, making it a total eclipse.

Joe Rao of Space.com
describes the moment between annular and total eclipses this way:

The silhouette of the moon is not a perfect circle, but rather slightly prickly with mountains, so just before the transition from annular to total, the eclipse will become something neither annular nor total: for a few precious seconds it will be a broken annular.

As lunar mountains protrude onto the hairline-thin ring of the sun, it will be seen not as an unbroken ring but an irregular, changing, sparkling sequence of arcs, beads and diamonds very briefly encircling the moon: a "diamond necklace" effect!

Solar eclipse: What's a 'hybrid' eclipse and how does it work? (+video) - CSMonitor.com


 
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