Word: mooning
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Dates: during 1970-1970
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...totality approaches on Nantucket, the "Diamond Ring Effect" should be visible. A thin circle of light, capped by one bright spot, surrounds the moon's black disc and creates the impression of a ring. About this time, ripples of light (the so-called shadow bands) may race across the landscape as sunlight is refracted by irregularities in the earth's upper atmosphere...
Several seconds before totality, a few pinpoints of sunlight will remain along the moon's edge, as lunar valleys allow the last modicum of sunlight to pass through. This phenomenon is generally called Baily's Beads, although astronomers here claim that a Harvard professor noticed the beads some 56 years before Baily...
...moon will completely cover the sun off the Massachusetts coast. The sky will grow so dark that photographers may need a flashlight to change their camera settings. Venus, Mercury, and some of the stars will be visible. The faint corona will appear to extend about four solar diameters from the sun's edge, and reddish prominence of glowing hydrogen gas will occasionally bubble up around the moon. Ground temperatures may drop ten or 15 degrees, and even in Cambridge, the partial eclipse may cause a drop of a degree or two. Greenhouse flowers may lose their petals. Some birds will...
After two minutes of totality, the entire process will be reversed, and by 2:57 p. m. the moon will uncover the last piece on the sun's left side...
...Pacific Coast of Central America and then race across Southern Mexico. The shadow would then pass over the southeastern U. S.. Nantucket, Nova Scotia, and Newfoundland before disappearing east of Greenland. This deep shadow or umbra is shaped like an inverted cone with its base on the moon and its narrowest point on the earth...