Word: menzel
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Astronomers no longer must wait for the few minutes of a solar eclipse, but can produce their own, using a technique described by Donald H. Menzel, Paine Professor of Practical Astronomy, in a book published today...
...Menzel's Our Sun presents information about the sun, gained since the invention of the coronagraph or artificial "sun-eclipser." With it, astronomers can create an "eclipse" in the laboratory every clear day and record it on film...
Tomorrow morning Menzel will see the real thing, weather permitting, when he takes his Freshman Seminar students and Observatory officials in a DC-6 to view a natural eclipse, the first in the Boston area for 300 years. It requires the shortest expedition ever for Harvard astronomers to study a solar eclipse...
...totality though, persons should remove their glasses or even use binoculars to see the full brilliance of the corona. Menzel said the eclipse can easily be photographed with an ordinary camera at f/6.3 at 1/25th, warning that most persons "overexpose these things badly...
...addition, Menzel said, it was imperative for the observers to shade their eyes with something stronger than ordinary sunglasses--fog photographic film or smoked window glass (smoked by a candle in sunlight...