Word: corona
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...Cambridge area, the ?? will cover some 96 per cent of ??sun-not quite enough to see the ??s faint corona, the shifting halo ??onized gases that extends millions miles from the sun's surface. But ?? Nantucket Island, the eclipse will match totality for about two minutes. ?? the sky is clear, thousands of New England sun-watchers will crowd the ?? antiquate ferry or fly out to the island ??or those two minutes. Executive Air-??nes regularly scheduled flights have been sold out for weeks, and several ?? ter airlines have assigned their en-??re flees to ferrying eclipse-watchers ??om mainland points...
...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...
...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...
...Harvard College Observatory's Orbiting Solar Observatory VI (OSO-VI) will take simultaneous ultra-violet observations of the sun's visible disc and corona during the rocket launch...
...heavily populated area of the U.S. in this century, local amateur astronomers plan to congregate on Nantucket Island. The moon will cover all but 2 per cent of sun in Boston, but that 2 per cent of sunlight will be enough to drown out the sun's faint corona...