Word: annular
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Dates: during 1970-1979
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...naked eye in daylight just before its close approach to the sun in December, and even more spectacularly in the evening during January as it begins to move away. Perhaps the most remarkable sight will be seen by observers in Latin America. On the day before Christmas, an annular eclipse* will occur over South America. That should create an awesome Yuletide display: a fiery ring of sunlight, the Comet Kohoutek and the bright planets Jupiter and Venus, all grouped in the same area of the eclipse-darkened...
...from the earth that the cone of the umbra falls short of the earth's surface. When this happens, the moon will appear smaller than the sun, and at mid-eclipse, the sun will form a ring around the smaller moon-an annular eclipse...
...ANNULAR and partial eclipses of the sun are not very interesting to scientists because the remaining two or three per cent of the ?? disc completely drowns out the coro?-a halo that is 500,000 times fain??er than the rest of the sun. It is possible to study the corona without an ??clips by using a coronagraph-a met?? disc held in front of telescope to create an artificial eclipse. However, interplanetary dust and sunlight scattered in the upper atmosphere obliterate the corona's fine details...